diff --git a/bootstrap_sdk b/bootstrap_sdk
index 089141eb1c..2193b8f357 100755
--- a/bootstrap_sdk
+++ b/bootstrap_sdk
@@ -33,7 +33,7 @@
 SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
 . "${SCRIPT_ROOT}/common.sh" || exit 1
 
-TYPE="coreos-sdk"
+TYPE="flatcar-sdk"
 
 . "${BUILD_LIBRARY_DIR}/catalyst.sh" || exit 1
 
@@ -63,7 +63,7 @@ catalyst_init "$@"
 check_gsutil_opts
 
 if [[ "$STAGES" =~ stage4 ]]; then
-    info "Setting release to ${COREOS_VERSION}"
+    info "Setting release to ${FLATCAR_VERSION}"
     rm -rf "${TEMPDIR}/stage4_overlay"
     # need to setup the lib->lib64 symlink correctly
     libdir=$(get_sdk_libdir)
diff --git a/build_docker_aci b/build_docker_aci
index 22207690f4..fe8c431c83 100755
--- a/build_docker_aci
+++ b/build_docker_aci
@@ -94,7 +94,7 @@ case "${version}" in
             "/usr/bin/docker-containerd-shim"
             "/usr/bin/docker-proxy"
             "/usr/bin/docker-runc"
-            "/usr/lib/coreos/dockerd"
+            "/usr/lib/flatcar/dockerd"
         )
         ebuild_aci_create "users.developer.core-os.net/skim/docker" \
             "coreos_docker-${BOARD}-${version}_coreos.${aci_version}" \
diff --git a/build_image b/build_image
index 285d113e3e..6a64a385b8 100755
--- a/build_image
+++ b/build_image
@@ -171,24 +171,24 @@ fix_mtab
 
 if [[ "${DEV_IMAGE}" -eq 1 ]]; then
   IMAGE_BUILD_TYPE="dev"
-  create_dev_image ${COREOS_DEVELOPER_IMAGE_NAME} ${DEV_DISK_LAYOUT} ${FLAGS_group} ${FLAGS_base_dev_pkg}
+  create_dev_image ${FLATCAR_DEVELOPER_IMAGE_NAME} ${DEV_DISK_LAYOUT} ${FLAGS_group} ${FLAGS_base_dev_pkg}
   if [[ ${FLAGS_extract_update} -eq ${FLAGS_TRUE} ]]; then
-    extract_update "${COREOS_DEVELOPER_IMAGE_NAME}" "${DEV_DISK_LAYOUT}"
+    extract_update "${FLATCAR_DEVELOPER_IMAGE_NAME}" "${DEV_DISK_LAYOUT}"
   fi
 fi
 
 if [[ "${CONTAINER}" -eq 1 ]]; then
   IMAGE_BUILD_TYPE="container"
-  create_dev_image "${COREOS_DEVELOPER_CONTAINER_NAME}" "${CONTAINER_LAYOUT}" "${FLAGS_group}" ${FLAGS_base_dev_pkg}
+  create_dev_image "${FLATCAR_DEVELOPER_CONTAINER_NAME}" "${CONTAINER_LAYOUT}" "${FLAGS_group}" ${FLAGS_base_dev_pkg}
 fi
 
 if [[ "${PROD_IMAGE}" -eq 1 ]]; then
   IMAGE_BUILD_TYPE="prod"
-  create_prod_image ${COREOS_PRODUCTION_IMAGE_NAME} ${DISK_LAYOUT} ${FLAGS_group} ${FLAGS_base_pkg}
+  create_prod_image ${FLATCAR_PRODUCTION_IMAGE_NAME} ${DISK_LAYOUT} ${FLAGS_group} ${FLAGS_base_pkg}
   if [[ ${FLAGS_generate_update} -eq ${FLAGS_TRUE} ]]; then
-    generate_update "${COREOS_PRODUCTION_IMAGE_NAME}" ${DISK_LAYOUT}
+    generate_update "${FLATCAR_PRODUCTION_IMAGE_NAME}" ${DISK_LAYOUT}
   elif [[ ${FLAGS_extract_update} -eq ${FLAGS_TRUE} ]]; then
-    extract_update "${COREOS_PRODUCTION_IMAGE_NAME}" "${DISK_LAYOUT}"
+    extract_update "${FLATCAR_PRODUCTION_IMAGE_NAME}" "${DISK_LAYOUT}"
   fi
 fi
 
@@ -199,15 +199,15 @@ then
 fi
 
 # Write out a version.txt file, this will be used by image_to_vm.sh
-split_ver "${COREOS_VERSION_ID}" SPLIT
+split_ver "${FLATCAR_VERSION_ID}" SPLIT
 tee "${BUILD_DIR}/version.txt" <<EOF
-COREOS_BUILD=${SPLIT[0]}
-COREOS_BRANCH=${SPLIT[1]}
-COREOS_PATCH=${SPLIT[2]}
-COREOS_VERSION=${COREOS_VERSION}
-COREOS_VERSION_ID=${COREOS_VERSION_ID}
-COREOS_BUILD_ID="${COREOS_BUILD_ID}"
-COREOS_SDK_VERSION=${COREOS_SDK_VERSION}
+FLATCAR_BUILD=${SPLIT[0]}
+FLATCAR_BRANCH=${SPLIT[1]}
+FLATCAR_PATCH=${SPLIT[2]}
+FLATCAR_VERSION=${FLATCAR_VERSION}
+FLATCAR_VERSION_ID=${FLATCAR_VERSION_ID}
+FLATCAR_BUILD_ID="${FLATCAR_BUILD_ID}"
+FLATCAR_SDK_VERSION=${FLATCAR_SDK_VERSION}
 EOF
 
 upload_image "${BUILD_DIR}/version.txt"
@@ -233,11 +233,11 @@ EOF
 
 # Print out the images we generated.
 if [[ "${PROD_IMAGE}" -eq 1 ]]; then
-  echo "CoreOS Production image created as ${COREOS_PRODUCTION_IMAGE_NAME}"
+  echo "Flatcar Production image created as ${FLATCAR_PRODUCTION_IMAGE_NAME}"
   print_image_to_vm
 fi
 if [[ "${DEV_IMAGE}" -eq 1 ]]; then
-  echo "Developer image created as ${COREOS_DEVELOPER_IMAGE_NAME}"
+  echo "Developer image created as ${FLATCAR_DEVELOPER_IMAGE_NAME}"
   print_image_to_vm dev
 fi
 
diff --git a/build_library/build_image_util.sh b/build_library/build_image_util.sh
index ccf24bd749..3dde0d6ec1 100755
--- a/build_library/build_image_util.sh
+++ b/build_library/build_image_util.sh
@@ -12,7 +12,7 @@
 # Use canonical path since some tools (e.g. mount) do not like symlinks.
 # Append build attempt to output directory.
 if [ -z "${FLAGS_version}" ]; then
-  IMAGE_SUBDIR="${FLAGS_group}-${COREOS_VERSION}-a${FLAGS_build_attempt}"
+  IMAGE_SUBDIR="${FLAGS_group}-${FLATCAR_VERSION}-a${FLAGS_build_attempt}"
 else
   IMAGE_SUBDIR="${FLAGS_group}-${FLAGS_version}"
 fi
@@ -66,7 +66,7 @@ extract_update() {
 
 zip_update_tools() {
   # There isn't a 'dev' variant of this zip, so always call it production.
-  local update_zip="coreos_production_update.zip"
+  local update_zip="flatcar_production_update.zip"
 
   info "Generating update tools zip"
   # Make sure some vars this script needs are exported
@@ -465,9 +465,9 @@ finish_image() {
   esac
 
   # Copy kernel to support dm-verity boots
-  sudo mkdir -p "${root_fs_dir}/boot/coreos"
+  sudo mkdir -p "${root_fs_dir}/boot/flatcar"
   sudo cp "${root_fs_dir}/usr/boot/vmlinuz" \
-       "${root_fs_dir}/boot/coreos/vmlinuz-a"
+       "${root_fs_dir}/boot/flatcar/vmlinuz-a"
 
   # Record directories installed to the state partition.
   # Explicitly ignore entries covered by existing configs.
@@ -488,14 +488,14 @@ finish_image() {
 
     # Create first-boot flag for grub and Ignition
     info "Writing first-boot flag"
-    sudo_clobber "${root_fs_dir}/boot/coreos/first_boot" <<EOF
+    sudo_clobber "${root_fs_dir}/boot/flatcar/first_boot" <<EOF
 If this file exists, Ignition will run and then delete the file.
 EOF
   fi
 
   if [[ -n "${FLAGS_developer_data}" ]]; then
-    local data_path="/usr/share/coreos/developer_data"
-    local unit_path="usr-share-coreos-developer_data"
+    local data_path="/usr/share/flatcar/developer_data"
+    local unit_path="usr-share-flatcar-developer_data"
     sudo cp "${FLAGS_developer_data}" "${root_fs_dir}/${data_path}"
     systemd_enable "${root_fs_dir}" system-config.target \
         "system-cloudinit@.service" "system-cloudinit@${unit_path}.service"
@@ -535,7 +535,7 @@ EOF
     # For arm64 an area between the EFI headers and the kernel text is used.
     # Our modified GRUB extracts the hash and adds it to the cmdline.
     printf %s "$(cat ${BUILD_DIR}/${image_name%.bin}_verity.txt)" | \
-        sudo dd of="${root_fs_dir}/boot/coreos/vmlinuz-a" conv=notrunc \
+        sudo dd of="${root_fs_dir}/boot/flatcar/vmlinuz-a" conv=notrunc \
         seek=${verity_offset} count=64 bs=1 status=none
   fi
 
@@ -543,22 +543,22 @@ EOF
   if [[ ${COREOS_OFFICIAL:-0} -ne 1 ]]; then
       sudo sbsign --key /usr/share/sb_keys/DB.key \
 	   --cert /usr/share/sb_keys/DB.crt \
-	   "${root_fs_dir}/boot/coreos/vmlinuz-a"
-      sudo mv "${root_fs_dir}/boot/coreos/vmlinuz-a.signed" \
-	   "${root_fs_dir}/boot/coreos/vmlinuz-a"
+	   "${root_fs_dir}/boot/flatcar/vmlinuz-a"
+      sudo mv "${root_fs_dir}/boot/flatcar/vmlinuz-a.signed" \
+	   "${root_fs_dir}/boot/flatcar/vmlinuz-a"
   fi
 
   if [[ -n "${image_kernel}" ]]; then
     # copying kernel from vfat so ignore the permissions
     cp --no-preserve=mode \
-        "${root_fs_dir}/boot/coreos/vmlinuz-a" \
+        "${root_fs_dir}/boot/flatcar/vmlinuz-a" \
         "${BUILD_DIR}/${image_kernel}"
   fi
 
   if [[ -n "${pcr_policy}" ]]; then
     mkdir -p "${BUILD_DIR}/pcrs"
     ${BUILD_LIBRARY_DIR}/generate_kernel_hash.sh \
-        "${root_fs_dir}/boot/coreos/vmlinuz-a" ${COREOS_VERSION} \
+        "${root_fs_dir}/boot/flatcar/vmlinuz-a" ${FLATCAR_VERSION} \
         >"${BUILD_DIR}/pcrs/kernel.config"
   fi
 
@@ -596,7 +596,7 @@ EOF
 
   if [[ -n "${pcr_policy}" ]]; then
     ${BUILD_LIBRARY_DIR}/generate_grub_hashes.py \
-        "${disk_img}" /usr/lib/grub/ "${BUILD_DIR}/pcrs" ${COREOS_VERSION}
+        "${disk_img}" /usr/lib/grub/ "${BUILD_DIR}/pcrs" ${FLATCAR_VERSION}
 
     info "Generating $pcr_policy"
     pushd "${BUILD_DIR}" >/dev/null
diff --git a/build_library/catalyst.sh b/build_library/catalyst.sh
index ea1fccf774..4ba1b3bf40 100644
--- a/build_library/catalyst.sh
+++ b/build_library/catalyst.sh
@@ -12,7 +12,7 @@
 : ${TYPE:="coreos-sdk"}
 : ${ARCH:=$(get_sdk_arch)}
 : ${DEFAULT_CATALYST_ROOT:="${DEFAULT_BUILD_ROOT}/catalyst"}
-: ${DEFAULT_SEED:=${COREOS_SDK_TARBALL_PATH}}
+: ${DEFAULT_SEED:=${FLATCAR_SDK_TARBALL_PATH}}
 : ${DEFAULT_PROFILE:=$(get_sdk_profile)}
 # Set to something like "stage4" to restrict what to build
 # FORCE_STAGES=
@@ -34,7 +34,7 @@ DEFINE_string coreos_overlay "${SRC_ROOT}/third_party/coreos-overlay" \
     "Path to the coreos-overlay git checkout."
 DEFINE_string seed_tarball "${DEFAULT_SEED}" \
     "Path to an existing stage tarball to start from."
-DEFINE_string version "${COREOS_VERSION}" \
+DEFINE_string version "${FLATCAR_VERSION}" \
     "Version to use for portage snapshot and stage tarballs."
 DEFINE_string profile "${DEFAULT_PROFILE}" \
     "Portage profile, may be prefixed with repo:"
@@ -196,7 +196,7 @@ catalyst_init() {
     DISTDIR="$CATALYST_ROOT/distfiles"
 
     # automatically download the current SDK if it is the seed tarball.
-    if [[ "$FLAGS_seed_tarball" == "${COREOS_SDK_TARBALL_PATH}" ]]; then
+    if [[ "$FLAGS_seed_tarball" == "${FLATCAR_SDK_TARBALL_PATH}" ]]; then
         sdk_download_tarball
     fi
 
diff --git a/build_library/check_root b/build_library/check_root
index 4a1b41af55..60adc2740b 100755
--- a/build_library/check_root
+++ b/build_library/check_root
@@ -116,7 +116,9 @@ IGNORE_SYMLINK = (
     b"/etc/motd",
 
     # Other
-    b"/etc/lsb-release"  # set later in the build process
+    b"/etc/lsb-release",  # set later in the build process
+    b"/usr/share/coreos", # set later in the build process
+    b"/etc/coreos"        # set later in the build process
 )
 
 
diff --git a/build_library/configure_bootloaders.sh b/build_library/configure_bootloaders.sh
index 27b862cbec..f163074f72 100755
--- a/build_library/configure_bootloaders.sh
+++ b/build_library/configure_bootloaders.sh
@@ -45,11 +45,11 @@ configure_pvgrub() {
   sudo_clobber "${GRUB_DIR}/menu.lst.A" <<EOF
 timeout         0
 
-title           CoreOS A Root
+title           Flatcar A Root
 root            (hd0,0)
 kernel          /syslinux/vmlinuz.A ${grub_args} ${slot_a_args}
 
-title           CoreOS B Root
+title           Flatcar B Root
 root            (hd0,0)
 kernel          /syslinux/vmlinuz.B ${grub_args} ${slot_b_args}
 EOF
diff --git a/build_library/dev_image_util.sh b/build_library/dev_image_util.sh
index ccc20d2b1a..ca43a2a94c 100755
--- a/build_library/dev_image_util.sh
+++ b/build_library/dev_image_util.sh
@@ -15,7 +15,7 @@ configure_dev_portage() {
 
     sudo mkdir -p "$1/etc/portage/repos.conf"
     sudo_clobber "$1/etc/portage/make.conf" <<EOF
-# make.conf for CoreOS dev images
+# make.conf for Flatcar dev images
 ARCH=$(get_board_arch $BOARD)
 CHOST=$(get_board_chost $BOARD)
 
@@ -25,8 +25,8 @@ PKGDIR="/var/lib/portage/pkgs"
 PORT_LOGDIR="/var/log/portage"
 PORTDIR="/var/lib/portage/portage-stable"
 PORTDIR_OVERLAY="/var/lib/portage/coreos-overlay"
-PORTAGE_BINHOST="http://builds.developer.core-os.net/boards/${BOARD}/${COREOS_VERSION_ID}/pkgs/
-http://builds.developer.core-os.net/boards/${BOARD}/${COREOS_VERSION_ID}/toolchain/"
+PORTAGE_BINHOST="http://builds.developer.core-os.net/boards/${BOARD}/${FLATCAR_VERSION_ID}/pkgs/
+http://builds.developer.core-os.net/boards/${BOARD}/${FLATCAR_VERSION_ID}/toolchain/"
 EOF
 
 sudo_clobber "$1/etc/portage/repos.conf/coreos.conf" <<EOF
@@ -104,7 +104,7 @@ create_dev_image() {
   # Setup portage for emerge and gmerge
   configure_dev_portage "${root_fs_dir}" "${devserver}"
 
-  sudo_append "${root_fs_dir}/etc/coreos/update.conf" <<EOF
+  sudo_append "${root_fs_dir}/etc/flatcar/update.conf" <<EOF
 SERVER=${auserver}
 
 # For gmerge
diff --git a/build_library/ebuild_aci_util.sh b/build_library/ebuild_aci_util.sh
index 73aedfba74..4fc2a5eeff 100644
--- a/build_library/ebuild_aci_util.sh
+++ b/build_library/ebuild_aci_util.sh
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# Expects BOARD, BUILD_DIR, BUILD_LIBRARY_DIR, and COREOS_VERSION in env.
+# Expects BOARD, BUILD_DIR, BUILD_LIBRARY_DIR, and FLATCAR_VERSION in env.
 
 # Copied from create_prod_image()
 create_ebuild_aci_image() {
@@ -60,7 +60,7 @@ ebuild_aci_create() {
     local extra_version="${1?No extra version number given}"; shift
     local pkg_files=( "${@}" )
 
-    local staging_image="coreos_pkg_staging_aci_stage.bin"
+    local staging_image="flatcar_pkg_staging_aci_stage.bin"
 
     local ebuild_atom="=${pkg}-${version}"
 
@@ -79,7 +79,7 @@ ebuild_aci_create() {
     ebuild_aci_write_manifest \
         "${aciroot}/manifest" \
         "${aci_name}" \
-        "${version}_coreos.${extra_version}"
+        "${version}_flatcar.${extra_version}"
 
     local pkg_files_in_rootfs=( "${pkg_files[@]/#/rootfs}" )
 
diff --git a/build_library/generate_grub_hashes.py b/build_library/generate_grub_hashes.py
index 750bb607b8..419e62e401 100755
--- a/build_library/generate_grub_hashes.py
+++ b/build_library/generate_grub_hashes.py
@@ -19,9 +19,9 @@ with open(filename, "rb") as f:
     corelen = bytearray(diskboot)[508] | bytearray(diskboot)[509] << 8
     f.seek(bootoffset+512)
     core = f.read(corelen * 512)
-    hashes = {"4": {"binaryvalues": [{"values": [{"value": hashlib.sha1(boot).hexdigest(), "description": "CoreOS Grub boot.img %s" % version}]}]},
-              "8": {"binaryvalues" : [{"values": [{"value": hashlib.sha1(diskboot).hexdigest(), "description": "CoreOS Grub diskboot.img %s" % version}]}]},
-              "9": {"binaryvalues": [{"values": [{"value": hashlib.sha1(core).hexdigest(), "description": "CoreOS Grub core.img %s" % version}]}]}}
+    hashes = {"4": {"binaryvalues": [{"values": [{"value": hashlib.sha1(boot).hexdigest(), "description": "Flatcar Grub boot.img %s" % version}]}]},
+              "8": {"binaryvalues" : [{"values": [{"value": hashlib.sha1(diskboot).hexdigest(), "description": "Flatcar Grub diskboot.img %s" % version}]}]},
+              "9": {"binaryvalues": [{"values": [{"value": hashlib.sha1(core).hexdigest(), "description": "Flatcar Grub core.img %s" % version}]}]}}
     with open(os.path.join(outputdir, "grub_loader.config"), "w") as f:
         f.write(json.dumps(hashes, sort_keys=True))
 
@@ -33,25 +33,25 @@ for folder, subs, files in os.walk(grubdir):
             with open(os.path.join(folder, filename), "rb") as f:
                 mod = f.read()
                 value = hashlib.sha1(mod).hexdigest()
-                description = "CoreOS Grub %s %s" % (filename, version)
+                description = "Flatcar Grub %s %s" % (filename, version)
                 hashvalues.append({"value": value, "description": description})
 
 with open(os.path.join(outputdir, "grub_modules.config"), "w") as f:
     f.write(json.dumps({"9": {"binaryvalues": [{"prefix": "grub_module", "values": hashvalues}]}}))
 
 with open(os.path.join(outputdir, "kernel_cmdline.config"), "w") as f:
-    f.write(json.dumps({"8": {"asciivalues": [{"prefix": "grub_kernel_cmdline", "values": [{"value": "rootflags=rw mount.usrflags=ro BOOT_IMAGE=/coreos/vmlinuz-[ab] mount.usr=PARTUUID=\S{36} rootflags=rw mount.usrflags=ro consoleblank=0 root=LABEL=ROOT (console=\S+)? (coreos.autologin=\S+)? verity.usrhash=\\S{64}", "description": "CoreOS kernel command line %s" % version}]}]}}))
+    f.write(json.dumps({"8": {"asciivalues": [{"prefix": "grub_kernel_cmdline", "values": [{"value": "rootflags=rw mount.usrflags=ro BOOT_IMAGE=/flatcar/vmlinuz-[ab] mount.usr=PARTUUID=\S{36} rootflags=rw mount.usrflags=ro consoleblank=0 root=LABEL=ROOT (console=\S+)? (flatcar.autologin=\S+)? verity.usrhash=\\S{64}", "description": "Flatcar kernel command line %s" % version}]}]}}))
 
-commands = [{"value": '\[.*\]', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'gptprio.next -d usr -u usr_uuid', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'insmod all_video', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'linux /coreos/vmlinuz-[ab] rootflags=rw mount.usrflags=ro consoleblank=0 root=LABEL=ROOT (console=\S+)? (coreos.autologin=\S+)?', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'menuentry CoreOS \S+ --id=coreos\S* {', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'search --no-floppy --set randomize_disk_guid --disk-uuid 00000000-0000-0000-0000-000000000001', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'search --no-floppy --set oem --part-label OEM --hint hd0,gpt1', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'set .+', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'setparams CoreOS default', "description": "CoreOS Grub configuration %s" % version},
-            {"value": 'source (hd0,gpt6)/grub.cfg', "description": "CoreOS Grub configuration %s" % version}]
+commands = [{"value": '\[.*\]', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'gptprio.next -d usr -u usr_uuid', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'insmod all_video', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'linux /flatcar/vmlinuz-[ab] rootflags=rw mount.usrflags=ro consoleblank=0 root=LABEL=ROOT (console=\S+)? (flatcar.autologin=\S+)?', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'menuentry Flatcar \S+ --id=flatcar\S* {', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'search --no-floppy --set randomize_disk_guid --disk-uuid 00000000-0000-0000-0000-000000000001', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'search --no-floppy --set oem --part-label OEM --hint hd0,gpt1', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'set .+', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'setparams Flatcar default', "description": "Flatcar Grub configuration %s" % version},
+            {"value": 'source (hd0,gpt6)/grub.cfg', "description": "Flatcar Grub configuration %s" % version}]
 
 with open(os.path.join(outputdir, "grub_commands.config"), "w") as f:
     f.write(json.dumps({"8": {"asciivalues": [{"prefix": "grub_cmd", "values": commands}]}}))
diff --git a/build_library/generate_kernel_hash.sh b/build_library/generate_kernel_hash.sh
index e9a258180b..429fe9cb7d 100755
--- a/build_library/generate_kernel_hash.sh
+++ b/build_library/generate_kernel_hash.sh
@@ -10,4 +10,4 @@ version=sys.argv[2]
 
 with open(path, "rb") as f:
     kernel = f.read()
-    print json.dumps({"9": {"binaryvalues": [{"prefix": "grub_linux", "values": [{"value": hashlib.sha1(kernel).hexdigest(), "description": "coreos-%s" % version}]}]}})
+    print json.dumps({"9": {"binaryvalues": [{"prefix": "grub_linux", "values": [{"value": hashlib.sha1(kernel).hexdigest(), "description": "flatcar-%s" % version}]}]}})
diff --git a/build_library/grub.cfg b/build_library/grub.cfg
index 6104f5ffd0..3d7ded1cda 100644
--- a/build_library/grub.cfg
+++ b/build_library/grub.cfg
@@ -1,17 +1,17 @@
 # Main GRUB config
 
 # Set the prefix back to the correct value after we're done with memdisk
-set prefix=($root)/coreos/grub
+set prefix=($root)/flatcar/grub
 
 # Load any and all video drivers.
 # Required under UEFI to boot Linux with a working console.
 insmod all_video
 
 # Default menuentry id and boot timeout
-set default="coreos"
+set default="flatcar"
 set timeout=1
 
-# Default kernel args for root filesystem, console, and CoreOS.
+# Default kernel args for root filesystem, console, and Flatcar.
 set linux_root="root=LABEL=ROOT"
 set linux_console=""
 set first_boot=""
@@ -66,20 +66,20 @@ if [ "$secure_boot" = "0" ]; then
 fi
 
 # Determine if this is a first boot.
-if [ -f "($root)/coreos/first_boot" ]; then
-    set first_boot="coreos.first_boot=detected"
+if [ -f "($root)/flatcar/first_boot" ]; then
+    set first_boot="flatcar.first_boot=detected"
 fi
 
 # Determine if the disk GUID needs to be randomized.
 search --no-floppy --set randomize_disk_guid \
        --disk-uuid 00000000-0000-0000-0000-000000000001
 if [ -n "$randomize_disk_guid" ]; then
-    set randomize_disk_guid="coreos.randomize_disk_guid=00000000-0000-0000-0000-000000000001"
+    set randomize_disk_guid="flatcar.randomize_disk_guid=00000000-0000-0000-0000-000000000001"
 fi
 
 set oem=""
 if [ -n "$oem_id" ]; then
-    set oem="coreos.oem.id=$oem_id"
+    set oem="flatcar.oem.id=$oem_id"
 fi
 
 # If no specific console has been set by the OEM then select based on
@@ -133,28 +133,28 @@ function gptprio {
     if [ $? -ne 0 -o -z "$usr_uuid" ]; then
         echo
         echo "Reading or updating the GPT failed!"
-        echo "Please file a bug with any messages above to CoreOS:"
-        echo " https://issues.coreos.com"
+        echo "Please file a bug with any messages above to Flatcar:"
+        echo " https://issues.flatcar-linux.org"
         abort
     fi
 
     set gptprio_cmdline="@@MOUNTUSR@@=PARTUUID=$usr_uuid"
     if [ "$usr_uuid" = "7130c94a-213a-4e5a-8e26-6cce9662f132" ]; then
-        set gptprio_kernel="/coreos/vmlinuz-a"
+        set gptprio_kernel="/flatcar/vmlinuz-a"
     else
-        set gptprio_kernel="/coreos/vmlinuz-b"
+        set gptprio_kernel="/flatcar/vmlinuz-b"
     fi
 }
 
-menuentry "CoreOS default" --id=coreos {
+menuentry "Flatcar default" --id=flatcar {
     gptprio
     linux$suf $gptprio_kernel $gptprio_cmdline $linux_cmdline
 }
 
-menuentry "CoreOS USR-A" --id=coreos-a {
-   linux$suf /coreos/vmlinuz-a @@MOUNTUSR@@=PARTLABEL=USR-A $linux_cmdline
+menuentry "Flatcar USR-A" --id=flatcar-a {
+   linux$suf /flatcar/vmlinuz-a @@MOUNTUSR@@=PARTLABEL=USR-A $linux_cmdline
 }
 
-menuentry "CoreOS USR-B" --id=coreos-b {
-   linux$suf /coreos/vmlinuz-b @@MOUNTUSR@@=PARTLABEL=USR-B $linux_cmdline
+menuentry "Flatcar USR-B" --id=flatcar-b {
+   linux$suf /flatcar/vmlinuz-b @@MOUNTUSR@@=PARTLABEL=USR-B $linux_cmdline
 }
diff --git a/build_library/grub_install.sh b/build_library/grub_install.sh
index adf411596a..b046e981d0 100755
--- a/build_library/grub_install.sh
+++ b/build_library/grub_install.sh
@@ -36,8 +36,8 @@ switch_to_strict_mode
 . "${BUILD_LIBRARY_DIR}/toolchain_util.sh" || exit 1
 . "${BUILD_LIBRARY_DIR}/board_options.sh" || exit 1
 
-# Our GRUB lives under coreos/grub so new pygrub versions cannot find grub.cfg
-GRUB_DIR="coreos/grub/${FLAGS_target}"
+# Our GRUB lives under flatcar/grub so new pygrub versions cannot find grub.cfg
+GRUB_DIR="flatcar/grub/${FLAGS_target}"
 
 # GRUB install location inside the SDK
 GRUB_SRC="/usr/lib/grub/${FLAGS_target}"
@@ -152,7 +152,7 @@ EOF
 # this because we need conflicting default behaviors between verity and
 # non-verity images.
 GRUB_TEMP_DIR=$(mktemp -d)
-if [[ ! -f "${ESP_DIR}/coreos/grub/grub.cfg.tar" ]]; then
+if [[ ! -f "${ESP_DIR}/flatcar/grub/grub.cfg.tar" ]]; then
     info "Generating grub.cfg memdisk"
 
     if [[ ${FLAGS_verity} -eq ${FLAGS_TRUE} ]]; then
@@ -166,7 +166,7 @@ if [[ ! -f "${ESP_DIR}/coreos/grub/grub.cfg.tar" ]]; then
         sed 's/@@MOUNTUSR@@/mount.usr/' > "${GRUB_TEMP_DIR}/grub.cfg"
     fi
 
-    sudo tar cf "${ESP_DIR}/coreos/grub/grub.cfg.tar" \
+    sudo tar cf "${ESP_DIR}/flatcar/grub/grub.cfg.tar" \
 	 -C "${GRUB_TEMP_DIR}" "grub.cfg"
 fi
 
@@ -176,7 +176,7 @@ sudo grub-mkimage \
     --format "${FLAGS_target}" \
     --directory "${GRUB_SRC}" \
     --config "${ESP_DIR}/${GRUB_DIR}/load.cfg" \
-    --memdisk "${ESP_DIR}/coreos/grub/grub.cfg.tar" \
+    --memdisk "${ESP_DIR}/flatcar/grub/grub.cfg.tar" \
     --output "${ESP_DIR}/${GRUB_DIR}/${CORE_NAME}" \
     "${CORE_MODULES[@]}"
 
diff --git a/build_library/modify_image_util.sh b/build_library/modify_image_util.sh
index a81122b55e..f8ed535762 100755
--- a/build_library/modify_image_util.sh
+++ b/build_library/modify_image_util.sh
@@ -14,7 +14,7 @@ start_modify_image() {
         FLAGS_from="$(readlink -f "${FLAGS_from}")"
     fi
 
-    local src_image="${FLAGS_from}/${COREOS_PRODUCTION_IMAGE_NAME}"
+    local src_image="${FLAGS_from}/${FLATCAR_PRODUCTION_IMAGE_NAME}"
     if [[ ! -f "${src_image}" ]]; then
         die_notrace "Source image does not exist: ${src_image}"
     fi
@@ -24,7 +24,7 @@ start_modify_image() {
         die_notrace "Source version info does not exist: ${FLAGS_from}/version.txt"
     fi
     source "${FLAGS_from}/version.txt"
-    COREOS_VERSION_STRING="${COREOS_VERSION}"
+    FLATCAR_VERSION_STRING="${FLATCAR_VERSION}"
 
     # Load after version.txt to set the correct output paths
     . "${BUILD_LIBRARY_DIR}/toolchain_util.sh"
@@ -44,7 +44,7 @@ start_modify_image() {
     fi
 
     # Create the output directory and temporary mount points.
-    DST_IMAGE="${BUILD_DIR}/${COREOS_PRODUCTION_IMAGE_NAME}"
+    DST_IMAGE="${BUILD_DIR}/${FLATCAR_PRODUCTION_IMAGE_NAME}"
     ROOT_FS_DIR="${BUILD_DIR}/rootfs"
     mkdir -p "${ROOT_FS_DIR}"
 
@@ -52,10 +52,10 @@ start_modify_image() {
     cp "${src_image}" "${DST_IMAGE}"
 
     # Copy all extra useful things, these do not need to be modified.
-    local update_prefix="${COREOS_PRODUCTION_IMAGE_NAME%_image.bin}_update"
-    local production_prefix="${COREOS_PRODUCTION_IMAGE_NAME%.bin}"
-    local container_prefix="${COREOS_DEVELOPER_CONTAINER_NAME%.bin}"
-    local pcr_data="${COREOS_PRODUCTION_IMAGE_NAME%.bin}_pcr_policy.zip"
+    local update_prefix="${FLATCAR_PRODUCTION_IMAGE_NAME%_image.bin}_update"
+    local production_prefix="${FLATCAR_PRODUCTION_IMAGE_NAME%.bin}"
+    local container_prefix="${FLATCAR_DEVELOPER_CONTAINER_NAME%.bin}"
+    local pcr_data="${FLATCAR_PRODUCTION_IMAGE_NAME%.bin}_pcr_policy.zip"
     EXTRA_FILES=(
         "version.txt"
         "${update_prefix}.bin"
@@ -64,7 +64,7 @@ start_modify_image() {
         "${production_prefix}_contents.txt"
         "${production_prefix}_packages.txt"
         "${production_prefix}_kernel_config.txt"
-        "${COREOS_DEVELOPER_CONTAINER_NAME}"
+        "${FLATCAR_DEVELOPER_CONTAINER_NAME}"
         "${container_prefix}_contents.txt"
         "${container_prefix}_packages.txt"
         )
diff --git a/build_library/oem_aci_util.sh b/build_library/oem_aci_util.sh
index f6a1bbf176..90fcd4d700 100644
--- a/build_library/oem_aci_util.sh
+++ b/build_library/oem_aci_util.sh
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# Expects BOARD, BUILD_DIR, BUILD_LIBRARY_DIR, and COREOS_VERSION in env.
+# Expects BOARD, BUILD_DIR, BUILD_LIBRARY_DIR, and FLATCAR_VERSION in env.
 
 # There must be a manifest template included with the ebuild at
 # files/manifest.in, which will have some variable values substituted before
@@ -81,7 +81,7 @@ oem_aci_write_manifest() {
     sudo cp "${manifest_template}" "${manifest}"
     sudo sed "${manifest}" -i \
         -e "s,@ACI_NAME@,${name}," \
-        -e "s,@ACI_VERSION@,${COREOS_VERSION}," \
+        -e "s,@ACI_VERSION@,${FLATCAR_VERSION}," \
         -e "s,@ACI_ARCH@,${appc_arch},"
 }
 
@@ -113,7 +113,7 @@ oem_aci_create() {
         "coreos.com/oem-${oem}"
 
     # Write a tar ACI file containing the manifest and mounted rootfs contents.
-    sudo tar -C "${aciroot}" -czf "${BUILD_DIR}/coreos-oem-${oem}.aci" \
+    sudo tar -C "${aciroot}" -czf "${BUILD_DIR}/flatcar-oem-${oem}.aci" \
         manifest rootfs
 
     # Unmount the staging image, and delete it to save space.
diff --git a/build_library/release_util.sh b/build_library/release_util.sh
index c48576f286..bfe92318ef 100644
--- a/build_library/release_util.sh
+++ b/build_library/release_util.sh
@@ -11,8 +11,8 @@ UPLOAD_DEFAULT=${FLAGS_FALSE}
 # Default upload root can be overridden from the environment.
 _user="${USER}"
 [[ ${USER} == "root" ]] && _user="${SUDO_USER}"
-: ${COREOS_UPLOAD_ROOT:=gs://users.developer.core-os.net/${_user}}
-: ${COREOS_TORCX_UPLOAD_ROOT:=${COREOS_UPLOAD_ROOT}/torcx}
+: ${FLATCAR_UPLOAD_ROOT:=gs://users.developer.core-os.net/${_user}}
+: ${FLATCAR_TORCX_UPLOAD_ROOT:=${FLATCAR_UPLOAD_ROOT}/torcx}
 unset _user
 
 IMAGE_ZIPPER="lbzip2 --compress --keep"
@@ -22,7 +22,7 @@ DEFINE_boolean parallel ${FLAGS_TRUE} \
   "Enable parallelism in gsutil."
 DEFINE_boolean upload ${UPLOAD_DEFAULT} \
   "Upload all packages/images via gsutil."
-DEFINE_string upload_root "${COREOS_UPLOAD_ROOT}" \
+DEFINE_string upload_root "${FLATCAR_UPLOAD_ROOT}" \
   "Upload prefix, board/version/etc will be appended. Must be a gs:// URL."
 DEFINE_string upload_path "" \
   "Full upload path, overrides --upload_root. Must be a full gs:// URL."
@@ -30,7 +30,7 @@ DEFINE_string download_root "" \
   "HTTP download prefix, board/version/etc will be appended."
 DEFINE_string download_path "" \
   "HTTP download path, overrides --download_root."
-DEFINE_string torcx_upload_root "${COREOS_TORCX_UPLOAD_ROOT}" \
+DEFINE_string torcx_upload_root "${FLATCAR_TORCX_UPLOAD_ROOT}" \
   "Tectonic torcx package and manifest Upload prefix. Must be a gs:// URL."
 DEFINE_string tectonic_torcx_download_root "" \
   "HTTP download prefix for tectonic torcx packages and manifests."
@@ -155,7 +155,7 @@ upload_packages() {
     [[ -n "${BOARD}" ]] || die "board_options.sh must be sourced first"
 
     local board_packages="${1:-"${BOARD_ROOT}/packages"}"
-    local def_upload_path="${UPLOAD_ROOT}/boards/${BOARD}/${COREOS_VERSION}"
+    local def_upload_path="${UPLOAD_ROOT}/boards/${BOARD}/${FLATCAR_VERSION}"
     sign_and_upload_files packages ${def_upload_path} "pkgs/" \
         "${board_packages}"/*
 }
@@ -214,7 +214,7 @@ upload_image() {
     fi
 
     local log_msg=$(basename "$digests" .DIGESTS)
-    local def_upload_path="${UPLOAD_ROOT}/boards/${BOARD}/${COREOS_VERSION}"
+    local def_upload_path="${UPLOAD_ROOT}/boards/${BOARD}/${FLATCAR_VERSION}"
     sign_and_upload_files "${log_msg}" "${def_upload_path}" "" "${uploads[@]}"
 }
 
@@ -233,9 +233,9 @@ download_image_url() {
         download_path="${FLAGS_download_path%%/}"
     elif [[ "${download_root}" = *release.core-os.net* ]]; then
         # Official release download paths don't include the boards directory
-        download_path="${download_root%%/}/${BOARD}/${COREOS_VERSION}"
+        download_path="${download_root%%/}/${BOARD}/${FLATCAR_VERSION}"
     else
-        download_path="${download_root%%/}/boards/${BOARD}/${COREOS_VERSION}"
+        download_path="${download_root%%/}/boards/${BOARD}/${FLATCAR_VERSION}"
     fi
 
     # Just in case download_root was set from UPLOAD_ROOT
diff --git a/build_library/toolchain_util.sh b/build_library/toolchain_util.sh
index d926251fda..000bc00aa5 100644
--- a/build_library/toolchain_util.sh
+++ b/build_library/toolchain_util.sh
@@ -143,14 +143,14 @@ get_board_binhost() {
     shift
 
     if [[ $# -eq 0 ]]; then
-        set -- "${COREOS_SDK_VERSION}" "${COREOS_VERSION_ID}"
+        set -- "${FLATCAR_SDK_VERSION}" "${FLATCAR_VERSION_ID}"
     fi
 
     for ver in "$@"; do
         if [[ $toolchain_only -eq 0 ]]; then
-            echo "${COREOS_DEV_BUILDS}/boards/${board}/${ver}/pkgs/"
+            echo "${FLATCAR_DEV_BUILDS}/boards/${board}/${ver}/pkgs/"
         fi
-        echo "${COREOS_DEV_BUILDS}/boards/${board}/${ver}/toolchain/"
+        echo "${FLATCAR_DEV_BUILDS}/boards/${board}/${ver}/toolchain/"
     done
 }
 
@@ -172,12 +172,12 @@ get_sdk_libdir() {
 get_sdk_binhost() {
     local arch=$(get_sdk_arch) ver
     if [[ $# -eq 0 ]]; then
-        set -- "${COREOS_SDK_VERSION}" "${COREOS_VERSION_ID}"
+        set -- "${FLATCAR_SDK_VERSION}" "${FLATCAR_VERSION_ID}"
     fi
 
     for ver in "$@"; do
-        echo "${COREOS_DEV_BUILDS}/sdk/${arch}/${ver}/pkgs/"
-        echo "${COREOS_DEV_BUILDS}/sdk/${arch}/${ver}/toolchain/"
+        echo "${FLATCAR_DEV_BUILDS}/sdk/${arch}/${ver}/pkgs/"
+        echo "${FLATCAR_DEV_BUILDS}/sdk/${arch}/${ver}/toolchain/"
     done
 }
 
diff --git a/build_library/vm_image_util.sh b/build_library/vm_image_util.sh
index cf14d51a56..cda0cf580a 100644
--- a/build_library/vm_image_util.sh
+++ b/build_library/vm_image_util.sh
@@ -361,7 +361,7 @@ set_vm_paths() {
     VM_TMP_DIR="${dst_dir}/${dst_name}.vmtmpdir"
     VM_TMP_IMG="${VM_TMP_DIR}/disk_image.bin"
     VM_TMP_ROOT="${VM_TMP_DIR}/rootfs"
-    VM_NAME="$(_src_to_dst_name "${src_name}" "")-${COREOS_VERSION}"
+    VM_NAME="$(_src_to_dst_name "${src_name}" "")-${FLATCAR_VERSION}"
     VM_README="${dst_dir}/$(_src_to_dst_name "${src_name}" ".README")"
 
     # Make VM_NAME safe for use as a hostname
@@ -447,8 +447,8 @@ setup_disk_image() {
     sudo mount -o remount,ro "${VM_TMP_ROOT}"
 
     VM_GROUP=$(grep --no-messages --no-filename ^GROUP= \
-        "${VM_TMP_ROOT}/usr/share/coreos/update.conf" \
-        "${VM_TMP_ROOT}/etc/coreos/update.conf" | \
+        "${VM_TMP_ROOT}/usr/share/flatcar/update.conf" \
+        "${VM_TMP_ROOT}/etc/flatcar/update.conf" | \
         tail -n 1 | sed -e 's/^GROUP=//')
     if [[ -z "${VM_GROUP}" ]]; then
         die "Unable to determine update group for this image."
@@ -491,7 +491,7 @@ install_oem_package() {
 install_oem_aci() {
     local oem_aci=$(_get_vm_opt OEM_ACI)
     local aci_dir="${FLAGS_to}/oem-${oem_aci}-aci"
-    local aci_path="${aci_dir}/coreos-oem-${oem_aci}.aci"
+    local aci_path="${aci_dir}/flatcar-oem-${oem_aci}.aci"
     local binpkgflags=(--nogetbinpkg)
 
     [ -n "${oem_aci}" ] || return 0
@@ -511,7 +511,7 @@ install_oem_aci() {
     info "Installing ${oem_aci} OEM ACI"
     sudo install -Dpm 0644 \
         "${aci_path}" \
-        "${VM_TMP_ROOT}/usr/share/oem/coreos-oem-${oem_aci}.aci" ||
+        "${VM_TMP_ROOT}/usr/share/oem/flatcar-oem-${oem_aci}.aci" ||
     die "Could not install ${oem_aci} OEM ACI"
 }
 
@@ -601,8 +601,8 @@ _write_cpio_common() {
     echo "/.noupdate f 444 root root echo -n" >"${VM_TMP_DIR}/extra"
 
     # Set correct group for PXE/ISO, which has no writeable /etc
-    echo /usr/share/coreos/update.conf f 644 root root \
-        "sed -e 's/GROUP=.*$/GROUP=${VM_GROUP}/' ${base_dir}/share/coreos/update.conf" \
+    echo /usr/share/flatcar/update.conf f 644 root root \
+        "sed -e 's/GROUP=.*$/GROUP=${VM_GROUP}/' ${base_dir}/share/flatcar/update.conf" \
         >> "${VM_TMP_DIR}/extra"
 
     # Build the squashfs, embed squashfs into a gzipped cpio
@@ -622,7 +622,7 @@ _write_cpio_disk() {
     local grub_name="$(_dst_name "_grub.efi")"
     _write_cpio_common $@
     # Pull the kernel and loader out of the filesystem
-    cp "${base_dir}"/boot/coreos/vmlinuz-a "${dst_dir}/${vmlinuz_name}"
+    cp "${base_dir}"/boot/flatcar/vmlinuz-a "${dst_dir}/${vmlinuz_name}"
 
     local grub_arch
     case $BOARD in
@@ -630,7 +630,7 @@ _write_cpio_disk() {
         arm64-usr) grub_arch="arm64-efi" ;;
     esac
 
-    cp "${base_dir}/boot/coreos/grub/${grub_arch}/core.efi" "${dst_dir}/${grub_name}"
+    cp "${base_dir}/boot/flatcar/grub/${grub_arch}/core.efi" "${dst_dir}/${grub_name}"
     VM_GENERATED_FILES+=( "${dst_dir}/${vmlinuz_name}" "${dst_dir}/${grub_name}" )
 }
 
@@ -642,22 +642,22 @@ _write_iso_disk() {
 
     mkdir "${iso_target}"
     pushd "${iso_target}" >/dev/null
-    mkdir isolinux syslinux coreos
-    _write_cpio_common "$1" "${iso_target}/coreos/cpio.gz"
-    cp "${base_dir}"/boot/vmlinuz "${iso_target}/coreos/vmlinuz"
+    mkdir isolinux syslinux flatcar
+    _write_cpio_common "$1" "${iso_target}/flatcar/cpio.gz"
+    cp "${base_dir}"/boot/vmlinuz "${iso_target}/flatcar/vmlinuz"
     cp -R /usr/share/syslinux/* isolinux/
     cat<<EOF > isolinux/isolinux.cfg
 INCLUDE /syslinux/syslinux.cfg
 EOF
     cat<<EOF > syslinux/syslinux.cfg
-default coreos
+default flatcar
 prompt 1
 timeout 15
 
-label coreos
+label flatcar
   menu default
-  kernel /coreos/vmlinuz
-  append initrd=/coreos/cpio.gz coreos.autologin
+  kernel /flatcar/vmlinuz
+  append initrd=/flatcar/cpio.gz flatcar.autologin
 EOF
     mkisofs -v -l -r -J -o $2 -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table .
     isohybrid $2
@@ -1110,10 +1110,10 @@ EOF
 
     cat >"${json}" <<EOF
 {
-  "name": "coreos-${VM_GROUP}",
-  "description": "CoreOS ${VM_GROUP}",
+  "name": "flatcar-${VM_GROUP}",
+  "description": "Flatcar ${VM_GROUP}",
   "versions": [{
-    "version": "${COREOS_VERSION_ID}",
+    "version": "${FLATCAR_VERSION_ID}",
     "providers": [{
       "name": "${provider}",
       "url": "$(download_image_url "$(_dst_name ".box")")",
@@ -1205,7 +1205,7 @@ vm_upload() {
         cp "${digests}.asc" "${legacy_digests}.asc"
     fi
 
-    local def_upload_path="${UPLOAD_ROOT}/boards/${BOARD}/${COREOS_VERSION}"
+    local def_upload_path="${UPLOAD_ROOT}/boards/${BOARD}/${FLATCAR_VERSION}"
     upload_files "$(_dst_name)" "${def_upload_path}" "" "${legacy_uploads[@]}"
 }
 
diff --git a/build_torcx_store b/build_torcx_store
index 700fe4aaf9..26ec7cbaee 100755
--- a/build_torcx_store
+++ b/build_torcx_store
@@ -265,7 +265,7 @@ done
 # order to get signed.
 sign_and_upload_files \
     'torcx manifest' \
-    "${UPLOAD_ROOT}/torcx/manifests/${BOARD}/${COREOS_VERSION}" \
+    "${UPLOAD_ROOT}/torcx/manifests/${BOARD}/${FLATCAR_VERSION}" \
     "" \
     "${manifest_path}"
 
diff --git a/common.sh b/common.sh
index aad6e75c25..8e3920c00b 100644
--- a/common.sh
+++ b/common.sh
@@ -233,7 +233,7 @@ get_gclient_root() {
 # Populate the ENVIRONMENT_WHITELIST array.
 load_environment_whitelist() {
   ENVIRONMENT_WHITELIST=(
-    COREOS_BUILD_ID
+    FLATCAR_BUILD_ID
     COREOS_OFFICIAL
     GIT_AUTHOR_EMAIL
     GIT_AUTHOR_NAME
@@ -287,39 +287,39 @@ BUILD_LIBRARY_DIR="${SCRIPTS_DIR}/build_library"
 REPO_CACHE_DIR="${REPO_ROOT}/.cache"
 REPO_MANIFESTS_DIR="${REPO_ROOT}/.repo/manifests"
 
-# Source COREOS_VERSION_ID from manifest.
+# Source FLATCAR_VERSION_ID from manifest.
 if [[ -f "${REPO_MANIFESTS_DIR}/version.txt" ]]; then
   # The build id may be provided externally by the build system.
-  if [[ -n ${COREOS_BUILD_ID} ]]; then
+  if [[ -n ${FLATCAR_BUILD_ID} ]]; then
     load_environment_var "${REPO_MANIFESTS_DIR}/version.txt" \
-    COREOS_VERSION_ID COREOS_SDK_VERSION
+    FLATCAR_VERSION_ID FLATCAR_SDK_VERSION
   else
     load_environment_var "${REPO_MANIFESTS_DIR}/version.txt" \
-    COREOS_VERSION_ID COREOS_BUILD_ID COREOS_SDK_VERSION
-    # Don't promote COREOS_BUILD_ID into an environment variable when it
+    FLATCAR_VERSION_ID FLATCAR_BUILD_ID FLATCAR_SDK_VERSION
+    # Don't promote FLATCAR_BUILD_ID into an environment variable when it
     # didn't start as one, since we don't want it leaking into the SDK
     # chroot environment via ENVIRONMENT_WHITELIST.
-    declare +x COREOS_BUILD_ID
+    declare +x FLATCAR_BUILD_ID
   fi
-  : ${COREOS_BUILD_ID:=$(date +%Y-%m-%d-%H%M)}
+  : ${FLATCAR_BUILD_ID:=$(date +%Y-%m-%d-%H%M)}
 elif [[ -f "${SCRIPT_LOCATION}/version.txt" ]]; then
   # This only happens in update.zip where we must use the current build id.
   load_environment_var "${SCRIPT_LOCATION}/version.txt" \
-      COREOS_VERSION_ID COREOS_BUILD_ID COREOS_SDK_VERSION
+      FLATCAR_VERSION_ID FLATCAR_BUILD_ID FLATCAR_SDK_VERSION
 else
   die "Unable to locate version.txt"
 fi
 
 # Official builds must set COREOS_OFFICIAL=1 to use an official version.
 # Unofficial builds always appended the build identifier.
-if [[ ${COREOS_OFFICIAL:-0} -ne 1 && -n "${COREOS_BUILD_ID}" ]]; then
-  COREOS_VERSION="${COREOS_VERSION_ID}+${COREOS_BUILD_ID}"
+if [[ ${COREOS_OFFICIAL:-0} -ne 1 && -n "${FLATCAR_BUILD_ID}" ]]; then
+  FLATCAR_VERSION="${FLATCAR_VERSION_ID}+${FLATCAR_BUILD_ID}"
 else
-  COREOS_VERSION="${COREOS_VERSION_ID}"
+  FLATCAR_VERSION="${FLATCAR_VERSION_ID}"
 fi
 
 # Compatibility alias
-COREOS_VERSION_STRING="${COREOS_VERSION}"
+FLATCAR_VERSION_STRING="${FLATCAR_VERSION}"
 
 # Calculate what today's build version should be, used by release
 # scripts to provide a reasonable default value. The value is the number
@@ -389,9 +389,9 @@ fi
 BUILD_DIR=
 
 # Standard filenames
-COREOS_DEVELOPER_IMAGE_NAME="coreos_developer_image.bin"
-COREOS_DEVELOPER_CONTAINER_NAME="coreos_developer_container.bin"
-COREOS_PRODUCTION_IMAGE_NAME="coreos_production_image.bin"
+FLATCAR_DEVELOPER_IMAGE_NAME="flatcar_developer_image.bin"
+FLATCAR_DEVELOPER_CONTAINER_NAME="flatcar_developer_container.bin"
+FLATCAR_PRODUCTION_IMAGE_NAME="flatcar_production_image.bin"
 
 # -----------------------------------------------------------------------------
 # Functions
diff --git a/contrib/create-coreos-vdi b/contrib/create-coreos-vdi
index 4788720ced..63f1826d57 100755
--- a/contrib/create-coreos-vdi
+++ b/contrib/create-coreos-vdi
@@ -77,12 +77,12 @@ if ! wget --spider --quiet "${DIGESTS_URL}"; then
     exit 1
 fi
 
-# Gets CoreOS verion from version.txt file
+# Gets Flatcar verion from version.txt file
 VERSION_NAME="version.txt"
 VERSION_URL="${BASE_URL}/${VERSION_NAME}"
 wget --no-verbose -O "${WORKDIR}/${VERSION_NAME}" "${VERSION_URL}"
 . "${WORKDIR}/${VERSION_NAME}"
-VDI_IMAGE_NAME="coreos_production_${COREOS_BUILD}.${COREOS_BRANCH}.${COREOS_PATCH}.vdi"
+VDI_IMAGE_NAME="flatcar_production_${FLATCAR_BUILD}.${FLATCAR_BRANCH}.${FLATCAR_PATCH}.vdi"
 VDI_IMAGE="${DEST}/${VDI_IMAGE_NAME}"
 
 # Setup GnuPG for verifying the image signature
@@ -118,6 +118,6 @@ VBoxManage convertdd "${DOWN_IMAGE}" "${VDI_IMAGE}" --format VDI
 rm -rf "${WORKDIR}"
 trap - EXIT
 
-echo "Success! CoreOS ${VERSION_ID} VDI image was created on ${VDI_IMAGE_NAME}"
+echo "Success! Flatcar ${VERSION_ID} VDI image was created on ${VDI_IMAGE_NAME}"
 
 # vim: ts=4 et
diff --git a/core_date b/core_date
index 74272cb626..bddf452f73 100755
--- a/core_date
+++ b/core_date
@@ -35,7 +35,7 @@ case "$1" in
             v="$1"
             shift
         else
-            v="${COREOS_VERSION}"
+            v="${FLATCAR_VERSION}"
         fi
 
         # strip of a v prefix or .0.0 suffix
diff --git a/core_pre_alpha b/core_pre_alpha
index c05b60dc44..c11bd7954f 100755
--- a/core_pre_alpha
+++ b/core_pre_alpha
@@ -12,7 +12,7 @@ export GCLIENT_ROOT=$(readlink -f "${SCRIPT_ROOT}/../../")
 
 DEFINE_string board "amd64-usr" \
     "Board type of the image"
-DEFINE_string version "${COREOS_VERSION}" \
+DEFINE_string version "${FLATCAR_VERSION}" \
     "Version number to promote."
 
 DEFINE_string build_storage "gs://builds.release.core-os.net" \
diff --git a/core_roller_upload b/core_roller_upload
index a358e708b5..a20ef5e845 100755
--- a/core_roller_upload
+++ b/core_roller_upload
@@ -14,7 +14,7 @@ DEFINE_string board "amd64-usr" \
     "Board type of the image"
 DEFINE_string payload "coreos_production_update.gz" \
     "Path to the update payload"
-DEFINE_string version "${COREOS_VERSION}" \
+DEFINE_string version "${FLATCAR_VERSION}" \
     "Version number of this build."
 DEFINE_string app_id "e96281a6-d1af-4bde-9a0a-97b76e56dc57" \
     "CoreOS AppId in roller."
diff --git a/image_inject_bootchain b/image_inject_bootchain
index ddd2de7c5e..af767fd346 100755
--- a/image_inject_bootchain
+++ b/image_inject_bootchain
@@ -28,7 +28,7 @@ DEFINE_string board "${DEFAULT_BOARD}" \
 DEFINE_string disk_layout "base" \
     "The disk layout type to use for this image."
 DEFINE_string from "" \
-    "Directory containing ${COREOS_PRODUCTION_IMAGE_NAME}"
+    "Directory containing ${FLATCAR_PRODUCTION_IMAGE_NAME}"
 DEFINE_string output_root "${DEFAULT_BUILD_ROOT}/images" \
     "Directory in which to place image result directories (named by version)"
 DEFINE_boolean replace ${FLAGS_FALSE} \
@@ -74,7 +74,7 @@ do_copy() {
 start_modify_image
 
 if [[ -n "${FLAGS_kernel_path}" ]]; then
-    do_copy "${FLAGS_kernel_path}" "/boot/coreos/vmlinuz-a"
+    do_copy "${FLAGS_kernel_path}" "/boot/flatcar/vmlinuz-a"
 fi
 
 # FIXME(bgilbert): no shim on arm64
diff --git a/image_set_group b/image_set_group
index 1db49e8341..08d01dfaf8 100755
--- a/image_set_group
+++ b/image_set_group
@@ -20,7 +20,7 @@ DEFINE_string board "${DEFAULT_BOARD}" \
 DEFINE_string disk_layout "base" \
   "The disk layout type to use for this image."
 DEFINE_string from "" \
-  "Directory containing ${COREOS_PRODUCTION_IMAGE_NAME}"
+  "Directory containing ${FLATCAR_PRODUCTION_IMAGE_NAME}"
 DEFINE_string output_root "${DEFAULT_BUILD_ROOT}/images" \
   "Directory in which to place image result directories (named by version)"
 DEFINE_boolean replace ${FLAGS_FALSE} \
@@ -56,9 +56,9 @@ fi
 
 start_modify_image
 
-info "Replacing /etc/coreos/update.conf"
-sudo mkdir -p "${ROOT_FS_DIR}/etc/coreos"
-sudo_clobber "${ROOT_FS_DIR}/etc/coreos/update.conf" <<EOF
+info "Replacing /etc/flatcar/update.conf"
+sudo mkdir -p "${ROOT_FS_DIR}/etc/flatcar"
+sudo_clobber "${ROOT_FS_DIR}/etc/flatcar/update.conf" <<EOF
 GROUP=${FLAGS_group}
 EOF
 
diff --git a/image_to_vm.sh b/image_to_vm.sh
index b9ea8b5f87..2a279d66f1 100755
--- a/image_to_vm.sh
+++ b/image_to_vm.sh
@@ -31,7 +31,7 @@ DEFINE_string board "${DEFAULT_BOARD}" \
 DEFINE_string format "" \
   "Output format, one of: ${VALID_IMG_TYPES[*]}"
 DEFINE_string from "" \
-  "Directory containing coreos_developer_image.bin or coreos_production_image.bin."
+  "Directory containing flatcar_developer_image.bin or flatcar_production_image.bin."
 DEFINE_string disk_layout "" \
   "The disk layout type to use for this image."
 DEFINE_integer mem "${DEFAULT_MEM}" \
@@ -104,16 +104,16 @@ FLAGS_to=`eval readlink -f $FLAGS_to`
 # If source includes version.txt switch to its version information
 if [ -f "${FLAGS_from}/version.txt" ]; then
     source "${FLAGS_from}/version.txt"
-    COREOS_VERSION_STRING="${COREOS_VERSION}"
+    FLATCAR_VERSION_STRING="${FLATCAR_VERSION}"
 fi
 
 if [ ${FLAGS_dev_image} -eq ${FLAGS_TRUE} ]; then
-  set_vm_paths "${FLAGS_from}" "${FLAGS_to}" "${COREOS_DEVELOPER_IMAGE_NAME}"
+  set_vm_paths "${FLAGS_from}" "${FLAGS_to}" "${FLATCAR_DEVELOPER_IMAGE_NAME}"
   if [[ "${FLAGS_disk_layout}" == "" ]]; then
     FLAGS_disk_layout=devel
   fi
 else
-  set_vm_paths "${FLAGS_from}" "${FLAGS_to}" "${COREOS_PRODUCTION_IMAGE_NAME}"
+  set_vm_paths "${FLAGS_from}" "${FLAGS_to}" "${FLATCAR_PRODUCTION_IMAGE_NAME}"
 fi
 
 # Make sure things are cleaned up on failure
diff --git a/jenkins/images.sh b/jenkins/images.sh
index 3a48624364..773eb02529 100644
--- a/jenkins/images.sh
+++ b/jenkins/images.sh
@@ -11,7 +11,7 @@ enter() {
         verify_key=--verify-key=/etc/portage/gangue.asc
         sudo ln -f "${GS_DEVEL_CREDS}" chroot/etc/portage/gangue.json
         bin/cork enter --experimental -- env \
-            COREOS_DEV_BUILDS="${DOWNLOAD_ROOT}" \
+            FLATCAR_DEV_BUILDS="${DOWNLOAD_ROOT}" \
             {FETCH,RESUME}COMMAND_GS="/usr/bin/gangue get \
 --json-key=/etc/portage/gangue.json $verify_key \
 "'"${URI}" "${DISTDIR}/${FILE}"' \
@@ -23,14 +23,14 @@ script() {
 }
 
 source .repo/manifests/version.txt
-export COREOS_BUILD_ID
+export FLATCAR_BUILD_ID
 
 # Set up GPG for signing uploads.
 gpg --import "${GPG_SECRET_KEY_FILE}"
 
 script setup_board \
     --board="${BOARD}" \
-    --getbinpkgver="${COREOS_VERSION}" \
+    --getbinpkgver="${FLATCAR_VERSION}" \
     --regen_configs_only
 
 if [ "x${COREOS_OFFICIAL}" == x1 ]
@@ -43,7 +43,7 @@ fi
 # Retrieve this version's torcx manifest
 mkdir -p torcx/pkgs
 enter gsutil cp -r \
-    "${DOWNLOAD_ROOT}/torcx/manifests/${BOARD}/${COREOS_VERSION}/torcx_manifest.json"{,.sig} \
+    "${DOWNLOAD_ROOT}/torcx/manifests/${BOARD}/${FLATCAR_VERSION}/torcx_manifest.json"{,.sig} \
     /mnt/host/source/torcx/
 gpg --verify torcx/torcx_manifest.json.sig
 
@@ -67,7 +67,7 @@ script build_image \
     --board="${BOARD}" \
     --group="${GROUP}" \
     --getbinpkg \
-    --getbinpkgver="${COREOS_VERSION}" \
+    --getbinpkgver="${FLATCAR_VERSION}" \
     --sign="${SIGNING_USER}" \
     --sign_digests="${SIGNING_USER}" \
     --torcx_manifest=/mnt/host/source/torcx/torcx_manifest.json \
diff --git a/jenkins/packages.sh b/jenkins/packages.sh
index 70cf3fcd2b..7773772b01 100644
--- a/jenkins/packages.sh
+++ b/jenkins/packages.sh
@@ -15,7 +15,7 @@ enter() {
         bin/cork enter --experimental -- env \
             CCACHE_DIR=/mnt/host/source/.cache/ccache \
             CCACHE_MAXSIZE=5G \
-            COREOS_DEV_BUILDS="${DOWNLOAD_ROOT}" \
+            FLATCAR_DEV_BUILDS="${DOWNLOAD_ROOT}" \
             {FETCH,RESUME}COMMAND_GS="/usr/bin/gangue get \
 --json-key=/etc/portage/gangue.json $verify_key \
 "'"${URI}" "${DISTDIR}/${FILE}"' \
@@ -27,7 +27,7 @@ script() {
 }
 
 source .repo/manifests/version.txt
-export COREOS_BUILD_ID
+export FLATCAR_BUILD_ID
 
 # Set up GPG for signing uploads.
 gpg --import "${GPG_SECRET_KEY_FILE}"
@@ -37,13 +37,13 @@ enter ccache --zero-stats
 
 script setup_board \
     --board="${BOARD}" \
-    --getbinpkgver=${RELEASE_BASE:-"${COREOS_VERSION}" --toolchainpkgonly} \
+    --getbinpkgver=${RELEASE_BASE:-"${FLATCAR_VERSION}" --toolchainpkgonly} \
     --skip_chroot_upgrade \
     --force
 
 script build_packages \
     --board="${BOARD}" \
-    --getbinpkgver=${RELEASE_BASE:-"${COREOS_VERSION}" --toolchainpkgonly} \
+    --getbinpkgver=${RELEASE_BASE:-"${FLATCAR_VERSION}" --toolchainpkgonly} \
     --skip_chroot_upgrade \
     --skip_torcx_store \
     --sign="${SIGNING_USER}" \
diff --git a/jenkins/sdk.sh b/jenkins/sdk.sh
index bdf5e60918..73aec7528c 100644
--- a/jenkins/sdk.sh
+++ b/jenkins/sdk.sh
@@ -5,7 +5,7 @@ enter() {
 }
 
 source .repo/manifests/version.txt
-export COREOS_BUILD_ID
+export FLATCAR_BUILD_ID
 
 # Set up GPG for signing uploads.
 gpg --import "${GPG_SECRET_KEY_FILE}"
diff --git a/jenkins/toolchains.sh b/jenkins/toolchains.sh
index a56ec9e867..3e016dcedd 100644
--- a/jenkins/toolchains.sh
+++ b/jenkins/toolchains.sh
@@ -5,7 +5,7 @@ enter() {
 }
 
 source .repo/manifests/version.txt
-export COREOS_BUILD_ID
+export FLATCAR_BUILD_ID
 
 # Set up GPG for signing uploads.
 gpg --import "${GPG_SECRET_KEY_FILE}"
diff --git a/jenkins/vm.sh b/jenkins/vm.sh
index 2e56025783..aab63e7949 100644
--- a/jenkins/vm.sh
+++ b/jenkins/vm.sh
@@ -11,7 +11,7 @@ enter() {
         verify_key=--verify-key=/etc/portage/gangue.asc
         sudo ln -f "${GS_DEVEL_CREDS}" chroot/etc/portage/gangue.json
         bin/cork enter --experimental -- env \
-            COREOS_DEV_BUILDS="${GS_DEVEL_ROOT}" \
+            FLATCAR_DEV_BUILDS="${GS_DEVEL_ROOT}" \
             {FETCH,RESUME}COMMAND_GS="/usr/bin/gangue get \
 --json-key=/etc/portage/gangue.json $verify_key \
 "'"${URI}" "${DISTDIR}/${FILE}"' \
@@ -23,7 +23,7 @@ script() {
 }
 
 source .repo/manifests/version.txt
-export COREOS_BUILD_ID
+export FLATCAR_BUILD_ID
 
 # Set up GPG for signing uploads.
 gpg --import "${GPG_SECRET_KEY_FILE}"
@@ -32,13 +32,13 @@ gpg --import "${GPG_SECRET_KEY_FILE}"
 
 mkdir -p src tmp
 bin/cork download-image \
-    --root="${UPLOAD_ROOT}/boards/${BOARD}/${COREOS_VERSION}" \
+    --root="${UPLOAD_ROOT}/boards/${BOARD}/${FLATCAR_VERSION}" \
     --json-key="${GOOGLE_APPLICATION_CREDENTIALS}" \
     --cache-dir=./src \
     --platform=qemu \
     --verify=true $verify_key
 
-img=src/coreos_production_image.bin
+img=src/flatcar_production_image.bin
 [[ "${img}.bz2" -nt "${img}" ]] &&
 enter lbunzip2 -k -f "/mnt/host/source/${img}.bz2"
 
@@ -46,7 +46,7 @@ script image_to_vm.sh \
     --board="${BOARD}" \
     --format="${FORMAT}" \
     --getbinpkg \
-    --getbinpkgver="${COREOS_VERSION}" \
+    --getbinpkgver="${FLATCAR_VERSION}" \
     --from=/mnt/host/source/src \
     --to=/mnt/host/source/tmp \
     --sign="${SIGNING_USER}" \
diff --git a/lib/cros_vm_constants.sh b/lib/cros_vm_constants.sh
index 9012135bfc..af65a8b046 100644
--- a/lib/cros_vm_constants.sh
+++ b/lib/cros_vm_constants.sh
@@ -7,9 +7,9 @@
 # Default values for creating VM's.
 DEFAULT_MEM="1024"
 DEFAULT_VMDK="ide.vmdk"
-DEFAULT_VMX="coreos.vmx"
+DEFAULT_VMX="flatcar.vmx"
 DEFAULT_VBOX_DISK="os.vdi"
-DEFAULT_QEMU_IMAGE="coreos_developer_qemu_image.img"
+DEFAULT_QEMU_IMAGE="flatcar_developer_qemu_image.img"
 
 # Minimum sizes for full size vm images -- needed for update.
 MIN_VDISK_SIZE_FULL=9216
diff --git a/oem/openstack/glance_load.sh b/oem/openstack/glance_load.sh
index e79b06fb69..0af21ba593 100755
--- a/oem/openstack/glance_load.sh
+++ b/oem/openstack/glance_load.sh
@@ -50,7 +50,7 @@ if [[ -z "${baseurl}" ]]; then
 fi
 
 version_url="${baseurl}/version.txt"
-image_url="${baseurl}/coreos_production_openstack_image.img.bz2"
+image_url="${baseurl}/flatcar_production_openstack_image.img.bz2"
 
 # use the following location as our local work space
 tmplocation=$(mktemp -d /var/tmp/glanceload.XXX)
@@ -60,25 +60,25 @@ curl --fail -s -L -O ${version_url}
 . version.txt
  
 # if we already have the image don't waste time
-if glance image-show "CoreOS-${release}-v${COREOS_VERSION}"; then
+if glance image-show "Flatcar-${release}-v${Flatcar_VERSION}"; then
   echo "Image already exists."
   rm -rf ${tmplocation}
   exit 
 fi
 
-coreosimg="coreos_${COREOS_VERSION}_openstack_image.img"
+flatcarimg="flatcar_${FLATCAR_VERSION}_openstack_image.img"
 
 # change the following line to reflect the image to be chosen, openstack
 #  is used by default
-curl --fail -s -L ${image_url} |  bunzip2 > ${coreosimg}
+curl --fail -s -L ${image_url} |  bunzip2 > ${flatcarimg}
  
 # perform actual image creation
 #  here we set the os_release, os_verison, os_family, and os_distro variables
 #  for intelligent consumption of images by scripts
-glance --os-image-api-version 1 image-create --name CoreOS-${release}-v${COREOS_VERSION} --progress \
-  --is-public true --property os_distro=coreos --property os_family=coreos \
-  --property os_version=${COREOS_VERSION} \
-  --disk-format qcow2 --container-format bare --min-disk 6 --file $coreosimg
+glance --os-image-api-version 1 image-create --name Flatcar-${release}-v${FLATCAR_VERSION} --progress \
+  --is-public true --property os_distro=flatcar --property os_family=flatcar \
+  --property os_version=${FLATCAR_VERSION} \
+  --disk-format qcow2 --container-format bare --min-disk 6 --file $flatcarimg
 
 # optionally, set --property os_release=${release} in the glance image-create
 # command above and uncomment the two commands below to support searching by
diff --git a/oem/oracle/launch-instance b/oem/oracle/launch-instance
index 804ffe0786..03f47e293c 100755
--- a/oem/oracle/launch-instance
+++ b/oem/oracle/launch-instance
@@ -84,7 +84,7 @@ if [[ "${ipxe}" = 1 ]]; then
         oempath="${bucket_base}/$(mktemp -u XXXXXXX)"
         gsutil -q cp "${tmpdir}/oem.cpio.gz" "gs://${oempath}"
 
-        ignition_initrd_args="initrd=ignition coreos.config.url=oem:///ign.ign"
+        ignition_initrd_args="initrd=ignition flatcar.config.url=oem:///ign.ign"
         ignition_initrd_cmd="initrd --name ignition http://${oempath}"
     fi
 
@@ -92,8 +92,8 @@ if [[ "${ipxe}" = 1 ]]; then
     cat >"${tmpdir}/ipxe" <<EOF
 #!ipxe
 
-kernel ${baseurl}/coreos_production_pxe.vmlinuz initrd=coreos_production_pxe_image.cpio.gz coreos.first_boot=1 ${ignition_initrd_args} console=ttyS0,9600 ${kargs}
-initrd ${baseurl}/coreos_production_pxe_image.cpio.gz
+kernel ${baseurl}/flatcar_production_pxe.vmlinuz initrd=flatcar_production_pxe_image.cpio.gz flatcar.first_boot=1 ${ignition_initrd_args} console=ttyS0,9600 ${kargs}
+initrd ${baseurl}/flatcar_production_pxe_image.cpio.gz
 ${ignition_initrd_cmd}
 boot
 EOF
diff --git a/offline_signing/sign.sh b/offline_signing/sign.sh
index ecd690a951..717ff31d8d 100755
--- a/offline_signing/sign.sh
+++ b/offline_signing/sign.sh
@@ -4,19 +4,19 @@ set -ex
 DATA_DIR="$(readlink -f "$1")"
 KEYS_DIR="$(readlink -f "$(dirname "$0")")"
 
-gpg2 --verify "${DATA_DIR}/coreos_production_update.bin.bz2.sig"
-gpg2 --verify "${DATA_DIR}/coreos_production_image.vmlinuz.sig"
-gpg2 --verify "${DATA_DIR}/coreos_production_update.zip.sig"
-bunzip2 --keep "${DATA_DIR}/coreos_production_update.bin.bz2"
-unzip "${DATA_DIR}/coreos_production_update.zip" -d "${DATA_DIR}"
+gpg2 --verify "${DATA_DIR}/flatcar_production_update.bin.bz2.sig"
+gpg2 --verify "${DATA_DIR}/flatcar_production_image.vmlinuz.sig"
+gpg2 --verify "${DATA_DIR}/flatcar_production_update.zip.sig"
+bunzip2 --keep "${DATA_DIR}/flatcar_production_update.bin.bz2"
+unzip "${DATA_DIR}/flatcar_production_update.zip" -d "${DATA_DIR}"
 
 export PATH="${DATA_DIR}:${PATH}"
 
 cd "${DATA_DIR}"
 ./core_sign_update \
-    --image "${DATA_DIR}/coreos_production_update.bin" \
-    --kernel "${DATA_DIR}/coreos_production_image.vmlinuz" \
-    --output "${DATA_DIR}/coreos_production_update.gz" \
+    --image "${DATA_DIR}/flatcar_production_update.bin" \
+    --kernel "${DATA_DIR}/flatcar_production_image.vmlinuz" \
+    --output "${DATA_DIR}/flatcar_production_update.gz" \
     --private_keys "${KEYS_DIR}/devel.key.pem+pkcs11:object=CoreOS_Update_Signing_Key;type=private" \
     --public_keys  "${KEYS_DIR}/devel.pub.pem+${KEYS_DIR}/prod-2.pub.pem" \
     --keys_separator "+"
diff --git a/offline_signing/transfer.sh b/offline_signing/transfer.sh
index 07bb0470a8..ab64d524aa 100755
--- a/offline_signing/transfer.sh
+++ b/offline_signing/transfer.sh
@@ -22,12 +22,12 @@ download() {
     pushd "${dir}" >/dev/null
 
     gsutil -m cp \
-        "${gs}/coreos_production_image.vmlinuz" \
-        "${gs}/coreos_production_image.vmlinuz.sig" \
-        "${gs}/coreos_production_update.bin.bz2" \
-        "${gs}/coreos_production_update.bin.bz2.sig" \
-        "${gs}/coreos_production_update.zip" \
-        "${gs}/coreos_production_update.zip.sig" ./
+        "${gs}/flatcar_production_image.vmlinuz" \
+        "${gs}/flatcar_production_image.vmlinuz.sig" \
+        "${gs}/flatcar_production_update.bin.bz2" \
+        "${gs}/flatcar_production_update.bin.bz2.sig" \
+        "${gs}/flatcar_production_update.zip" \
+        "${gs}/flatcar_production_update.zip.sig" ./
 
     # torcx manifest: try embargoed release bucket first
     local torcx_base="gs://builds.release.core-os.net/embargoed/devfiles/torcx/manifests/${board}/${version}"
@@ -40,9 +40,9 @@ download() {
         "${torcx_base}/torcx_manifest.json.sig" \
         ./
 
-    gpg2 --verify "coreos_production_image.vmlinuz.sig"
-    gpg2 --verify "coreos_production_update.bin.bz2.sig"
-    gpg2 --verify "coreos_production_update.zip.sig"
+    gpg2 --verify "flatcar_production_image.vmlinuz.sig"
+    gpg2 --verify "flatcar_production_update.bin.bz2.sig"
+    gpg2 --verify "flatcar_production_update.zip.sig"
     gpg2 --verify "torcx_manifest.json.sig"
 
     popd >/dev/null
@@ -54,7 +54,7 @@ upload() {
     local board="$3"
 
     local dir="${BASEDIR}/${board}/${version}"
-    local payload="${dir}/coreos_production_update.gz"
+    local payload="${dir}/flatcar_production_update.gz"
     local torcx_manifest="${dir}/torcx_manifest.json"
     local torcx_manifest_sig="${dir}/torcx_manifest.json.asc"
     local path
diff --git a/sdk_lib/make_chroot.sh b/sdk_lib/make_chroot.sh
index 90db639017..1738da7722 100755
--- a/sdk_lib/make_chroot.sh
+++ b/sdk_lib/make_chroot.sh
@@ -112,7 +112,7 @@ init_users () {
   touch "${FLAGS_chroot}/etc/"{group,gshadow,passwd,shadow}
   chmod 640 "${FLAGS_chroot}/etc/"{gshadow,shadow}
 
-  # do nothing with the CoreOS system user
+  # do nothing with the Flatcar system user
   if [[ "${SUDO_USER}" == core ]]; then
     return
   fi
@@ -166,7 +166,7 @@ EOF
 
    # Add chromite/bin into the path globally
    # We rely on 'env-update' getting called below.
-   target="${FLAGS_chroot}/etc/env.d/99coreos"
+   target="${FLAGS_chroot}/etc/env.d/99flatcar"
    cat <<EOF > "${target}"
 PATH=${CHROOT_TRUNK_DIR}/chromite/bin
 ROOTPATH=${CHROOT_TRUNK_DIR}/chromite/bin
diff --git a/sdk_lib/sdk_util.sh b/sdk_lib/sdk_util.sh
index 5c60e46159..62c8066676 100644
--- a/sdk_lib/sdk_util.sh
+++ b/sdk_lib/sdk_util.sh
@@ -5,13 +5,13 @@
 # found in the LICENSE file.
 
 # common.sh must be properly sourced before this file.
-[[ -n "${COREOS_SDK_VERSION}" ]] || exit 1
+[[ -n "${FLATCAR_SDK_VERSION}" ]] || exit 1
 
-COREOS_SDK_ARCH="amd64" # We are unlikely to support anything else.
-COREOS_SDK_TARBALL="coreos-sdk-${COREOS_SDK_ARCH}-${COREOS_SDK_VERSION}.tar.bz2"
-COREOS_SDK_TARBALL_CACHE="${REPO_CACHE_DIR}/sdks"
-COREOS_SDK_TARBALL_PATH="${COREOS_SDK_TARBALL_CACHE}/${COREOS_SDK_TARBALL}"
-COREOS_SDK_URL="${COREOS_DEV_BUILDS}/sdk/${COREOS_SDK_ARCH}/${COREOS_SDK_VERSION}/${COREOS_SDK_TARBALL}"
+FLATCAR_SDK_ARCH="amd64" # We are unlikely to support anything else.
+FLATCAR_SDK_TARBALL="flatcar-sdk-${FLATCAR_SDK_ARCH}-${FLATCAR_SDK_VERSION}.tar.bz2"
+FLATCAR_SDK_TARBALL_CACHE="${REPO_CACHE_DIR}/sdks"
+FLATCAR_SDK_TARBALL_PATH="${FLATCAR_SDK_TARBALL_CACHE}/${FLATCAR_SDK_TARBALL}"
+FLATCAR_SDK_URL="${FLATCAR_DEV_BUILDS}/sdk/${FLATCAR_SDK_ARCH}/${FLATCAR_SDK_VERSION}/${FLATCAR_SDK_TARBALL}"
 
 # Download the current SDK tarball (if required) and verify digests/sig
 sdk_download_tarball() {
@@ -19,13 +19,13 @@ sdk_download_tarball() {
         return 0
     fi
 
-    info "Downloading ${COREOS_SDK_TARBALL}"
-    info "URL: ${COREOS_SDK_URL}"
+    info "Downloading ${FLATCAR_SDK_TARBALL}"
+    info "URL: ${FLATCAR_SDK_URL}"
     local suffix
     for suffix in "" ".DIGESTS"; do # TODO(marineam): download .asc
         wget --tries=3 --timeout=30 --continue \
-            -O  "${COREOS_SDK_TARBALL_PATH}${suffix}" \
-            "${COREOS_SDK_URL}${suffix}" \
+            -O  "${FLATCAR_SDK_TARBALL_PATH}${suffix}" \
+            "${FLATCAR_SDK_URL}${suffix}" \
             || die_notrace "SDK download failed!"
     done
 
@@ -34,21 +34,21 @@ sdk_download_tarball() {
 }
 
 sdk_verify_digests() {
-    if [[ ! -f "${COREOS_SDK_TARBALL_PATH}" || \
-          ! -f "${COREOS_SDK_TARBALL_PATH}.DIGESTS" ]]; then
+    if [[ ! -f "${FLATCAR_SDK_TARBALL_PATH}" || \
+          ! -f "${FLATCAR_SDK_TARBALL_PATH}.DIGESTS" ]]; then
         return 1
     fi
 
     # TODO(marineam): Add gpg signature verification too.
 
-    verify_digests "${COREOS_SDK_TARBALL_PATH}" || return 1
+    verify_digests "${FLATCAR_SDK_TARBALL_PATH}" || return 1
 }
 
 sdk_clean_cache() {
-    pushd "${COREOS_SDK_TARBALL_CACHE}" >/dev/null
+    pushd "${FLATCAR_SDK_TARBALL_CACHE}" >/dev/null
     local filename
     for filename in *; do
-        if [[ "${filename}" == "${COREOS_SDK_TARBALL}"* ]]; then
+        if [[ "${filename}" == "${FLATCAR_SDK_TARBALL}"* ]]; then
             continue
         fi
         info "Cleaning up ${filename}"
diff --git a/setup_board b/setup_board
index 73861d2feb..f6ee97a1ea 100755
--- a/setup_board
+++ b/setup_board
@@ -120,9 +120,9 @@ EOF
 generate_binhost_list() {
   local t
   [[ "${FLAGS_toolchainpkgonly}" -eq "${FLAGS_TRUE}" ]] && t="-t"
-  FLAGS_getbinpkgver="${FLAGS_getbinpkgver/current/${COREOS_VERSION_ID}}"
-  FLAGS_getbinpkgver="${FLAGS_getbinpkgver/latest/${COREOS_VERSION_ID}}"
-  FLAGS_getbinpkgver="${FLAGS_getbinpkgver/sdk/${COREOS_SDK_VERSION}}"
+  FLAGS_getbinpkgver="${FLAGS_getbinpkgver/current/${FLATCAR_VERSION_ID}}"
+  FLAGS_getbinpkgver="${FLAGS_getbinpkgver/latest/${FLATCAR_VERSION_ID}}"
+  FLAGS_getbinpkgver="${FLAGS_getbinpkgver/sdk/${FLATCAR_SDK_VERSION}}"
 
   get_board_binhost $t "${BOARD}" ${FLAGS_getbinpkgver}
 }
diff --git a/tag_release b/tag_release
index 8ad71342d3..f97ee53aac 100755
--- a/tag_release
+++ b/tag_release
@@ -28,7 +28,7 @@ DEFAULT_MINOR=0
 DEFAULT_BRANCH=${FLAGS_FALSE}
 DEFAULT_BRANCH_PROJECTS=
 
-CURRENT_VERSION=( ${COREOS_VERSION_ID//./ } )
+CURRENT_VERSION=( ${FLATCAR_VERSION_ID//./ } )
 
 # Detect if we are on a branch or still tracking master.
 DEFAULT_MANIFEST=$(readlink "${REPO_MANIFESTS_DIR}/default.xml") \
@@ -48,8 +48,8 @@ fi
 DEFINE_integer major ${DEFAULT_MAJOR} "Branch major version (aka 'build')"
 DEFINE_integer minor ${DEFAULT_MINOR} "Branch revision or minor version"
 DEFINE_integer patch 0 "Branch patch id, normally 0"
-DEFINE_string sdk_version "${COREOS_VERSION_ID}" \
-    "SDK version to use, or 'keep'. (current: ${COREOS_SDK_VERSION})"
+DEFINE_string sdk_version "${FLATCAR_VERSION_ID}" \
+    "SDK version to use, or 'keep'. (current: ${FLATCAR_SDK_VERSION})"
 DEFINE_boolean branch ${DEFAULT_BRANCH} "Release branch, diverge from master"
 DEFINE_string branch_projects "${DEFAULT_BRANCH_PROJECTS}" \
     "Branch the named projects (with a 'coreos/' prefix) in the manifest."
@@ -82,7 +82,7 @@ TAG_NAME="v${BRANCH_VERSION}"
 
 if [[ "${FLAGS_sdk_version}" == keep || "${FLAGS_sdk_version}" == current ]]
 then
-    FLAGS_sdk_version="${COREOS_SDK_VERSION}"
+    FLAGS_sdk_version="${FLATCAR_SDK_VERSION}"
 fi
 
 if [[ "${FLAGS_sdk_version}" == "${BRANCH_VERSION}" ]]; then
@@ -92,9 +92,9 @@ if [[ "${FLAGS_sdk_version}" == "${BRANCH_VERSION}" ]]; then
 fi
 
 # Verify that the specified SDK version exists
-COREOS_SDK_VERSION="${FLAGS_sdk_version}"
+FLATCAR_SDK_VERSION="${FLAGS_sdk_version}"
 . "${SCRIPT_ROOT}/sdk_lib/sdk_util.sh"
-if ! curl --head --fail --silent "${COREOS_SDK_URL}" > /dev/null ; then
+if ! curl --head --fail --silent "${FLATCAR_SDK_URL}" > /dev/null ; then
     die_notrace "SDK version does not exist." \
         "Try --sdk_version keep to use the existing SDK."
 fi
@@ -140,10 +140,10 @@ if [[ ${FLAGS_branch} -eq ${FLAGS_TRUE} ]]; then
 fi
 
 tee version.txt <<EOF
-COREOS_VERSION=${BRANCH_VERSION}
-COREOS_VERSION_ID=${BRANCH_VERSION}
-COREOS_BUILD_ID=""
-COREOS_SDK_VERSION=${FLAGS_sdk_version}
+FLATCAR_VERSION=${BRANCH_VERSION}
+FLATCAR_VERSION_ID=${BRANCH_VERSION}
+FLATCAR_BUILD_ID=""
+FLATCAR_SDK_VERSION=${FLAGS_sdk_version}
 EOF
 git add version.txt
 
@@ -154,7 +154,7 @@ export GPG_TTY
 info "Creating ${BRANCH_NAME} and tag ${TAG_NAME}"
 git commit -m "${BRANCH_NAME}: release ${TAG_NAME}"
 git branch -f "${BRANCH_NAME}"
-git tag "${sign_args[@]}" -m "CoreOS ${TAG_NAME}" "${TAG_NAME}"
+git tag "${sign_args[@]}" -m "Flatcar ${TAG_NAME}" "${TAG_NAME}"
 
 # Unpin and branch the important projects, if requested and they are pinned.
 if [[ -n "${FLAGS_branch_projects}" ]]; then
diff --git a/update_chroot b/update_chroot
index 10738f9f75..6d55b1b45e 100755
--- a/update_chroot
+++ b/update_chroot
@@ -159,14 +159,14 @@ fi
 
 info "Updating chroot:"
 info " chroot version: $OLDVER"
-info " CoreOS version: $COREOS_VERSION"
+info " Flatcar version: $FLATCAR_VERSION"
 
 # Updates should be of the form 1.2.3_desc.sh
 for update_script in ${SCRIPTS_DIR}/sdk_lib/updates/*.sh; do
   update_name="${update_script##*/}"
   update_ver="${update_name%%_*}"
   # Run newer updates but don't pass our current version
-  if ! cmp_ver le "$update_ver" "$COREOS_VERSION"; then
+  if ! cmp_ver le "$update_ver" "$FLATCAR_VERSION"; then
       warn "Skipping update from the future: $update_name"
       warn "Perhaps it is time to run a repo sync?"
   elif ! cmp_ver ge "$OLDVER" "$update_ver"; then