diff --git a/build_library/toolchain_util.sh b/build_library/toolchain_util.sh
index cbec7e2bad..1024a4e2fb 100644
--- a/build_library/toolchain_util.sh
+++ b/build_library/toolchain_util.sh
@@ -175,14 +175,15 @@ get_sdk_binhost() {
         set -- "${FLATCAR_SDK_VERSION}"
     fi
 
+    FLATCAR_DEV_BUILDS_SDK="${FLATCAR_DEV_BUILDS_SDK-$FLATCAR_DEV_BUILDS/sdk}"
     for ver in "$@"; do
         # Usually only crossdev needs to be fetched from /toolchain/ in the setup_board step.
         # The entry for /pkgs/ is there if something needs to be reinstalled in the SDK
         # but normally it is not needed because everything is already part of the tarball.
         # To install the crossdev Rust package, /toolchain-arm64/ is derived from /toolchain/
         # when necessary in install_cross_toolchain().
-        echo "${FLATCAR_DEV_BUILDS}/sdk/${arch}/${ver}/toolchain/"
-        echo "${FLATCAR_DEV_BUILDS}/sdk/${arch}/${ver}/pkgs/"
+        echo "${FLATCAR_DEV_BUILDS_SDK}/${arch}/${ver}/toolchain/"
+        echo "${FLATCAR_DEV_BUILDS_SDK}/${arch}/${ver}/pkgs/"
     done
 }
 
diff --git a/jenkins/images.sh b/jenkins/images.sh
index 5335252536..8ce5393b45 100644
--- a/jenkins/images.sh
+++ b/jenkins/images.sh
@@ -12,6 +12,7 @@ enter() {
         sudo ln -f "${GS_DEVEL_CREDS}" chroot/etc/portage/gangue.json
         bin/cork enter --bind-gpg-agent=false -- env \
             FLATCAR_DEV_BUILDS="${DOWNLOAD_ROOT}" \
+            FLATCAR_DEV_BUILDS_SDK="${DOWNLOAD_ROOT_SDK}" \
             {FETCH,RESUME}COMMAND_GS="/usr/bin/gangue get \
 --json-key=/etc/portage/gangue.json $verify_key \
 "'"${URI}" "${DISTDIR}/${FILE}"' \
diff --git a/jenkins/packages.sh b/jenkins/packages.sh
index 8820b47b57..352f74f598 100644
--- a/jenkins/packages.sh
+++ b/jenkins/packages.sh
@@ -16,6 +16,7 @@ enter() {
             CCACHE_DIR=/mnt/host/source/ccache \
             CCACHE_MAXSIZE=5G \
             FLATCAR_DEV_BUILDS="${DOWNLOAD_ROOT}" \
+            FLATCAR_DEV_BUILDS_SDK="${DOWNLOAD_ROOT_SDK}" \
             {FETCH,RESUME}COMMAND_GS="/usr/bin/gangue get \
 --json-key=/etc/portage/gangue.json $verify_key \
 "'"${URI}" "${DISTDIR}/${FILE}"' \
diff --git a/jenkins/sdk.sh b/jenkins/sdk.sh
index 2fe868bfb3..526c1d9f21 100644
--- a/jenkins/sdk.sh
+++ b/jenkins/sdk.sh
@@ -13,7 +13,7 @@ gpg --import "${GPG_SECRET_KEY_FILE}"
 # Wipe all of catalyst.
 sudo rm -rf src/build
 
-enter sudo /mnt/host/source/src/scripts/bootstrap_sdk \
+enter sudo FLATCAR_DEV_BUILDS_SDK="${DOWNLOAD_ROOT_SDK}" /mnt/host/source/src/scripts/bootstrap_sdk \
     --sign="${SIGNING_USER}" \
     --sign_digests="${SIGNING_USER}" \
     --upload_root="${UPLOAD_ROOT}" \
diff --git a/jenkins/toolchains.sh b/jenkins/toolchains.sh
index 185cd95415..c7822619ff 100644
--- a/jenkins/toolchains.sh
+++ b/jenkins/toolchains.sh
@@ -13,7 +13,7 @@ gpg --import "${GPG_SECRET_KEY_FILE}"
 # Wipe all of catalyst.
 sudo rm -rf src/build
 
-enter sudo /mnt/host/source/src/scripts/build_toolchains \
+enter sudo FLATCAR_DEV_BUILDS_SDK="${DOWNLOAD_ROOT_SDK}" /mnt/host/source/src/scripts/build_toolchains \
     --sign="${SIGNING_USER}" \
     --sign_digests="${SIGNING_USER}" \
     --upload_root="${UPLOAD_ROOT}" \
diff --git a/jenkins/vm.sh b/jenkins/vm.sh
index 1acfe58bcd..2526fc69bd 100644
--- a/jenkins/vm.sh
+++ b/jenkins/vm.sh
@@ -12,6 +12,7 @@ enter() {
         sudo ln -f "${GS_DEVEL_CREDS}" chroot/etc/portage/gangue.json
         bin/cork enter --bind-gpg-agent=false -- env \
             FLATCAR_DEV_BUILDS="${GS_DEVEL_ROOT}" \
+            FLATCAR_DEV_BUILDS_SDK="${DOWNLOAD_ROOT_SDK}" \
             {FETCH,RESUME}COMMAND_GS="/usr/bin/gangue get \
 --json-key=/etc/portage/gangue.json $verify_key \
 "'"${URI}" "${DISTDIR}/${FILE}"' \
diff --git a/sdk_lib/sdk_util.sh b/sdk_lib/sdk_util.sh
index 62c8066676..d58a182705 100644
--- a/sdk_lib/sdk_util.sh
+++ b/sdk_lib/sdk_util.sh
@@ -11,7 +11,8 @@ 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}/${FLATCAR_SDK_TARBALL}"
+FLATCAR_DEV_BUILDS_SDK="${FLATCAR_DEV_BUILDS_SDK-$FLATCAR_DEV_BUILDS/sdk}"
+FLATCAR_SDK_URL="${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() {
diff --git a/update_chroot b/update_chroot
index 3e93c7e8fd..2f0cb492d7 100755
--- a/update_chroot
+++ b/update_chroot
@@ -27,6 +27,8 @@ DEFINE_boolean skip_toolchain_update "${FLAGS_FALSE}" \
   "Don't update the toolchains."
 DEFINE_string toolchain_boards "" \
   "Extra toolchains to setup for the specified boards."
+DEFINE_string dev_builds_sdk "" \
+  "Set FLATCAR_DEV_BUILDS_SDK which defaults to FLATCAR_DEV_BUILDS/sdk"
 DEFINE_string binhost "" \
   "Use binary packages from a specific location (e.g. https://storage.googleapis.com/flatcar-jenkins/sdk/amd64/2000.0.0/pkgs)"
 
@@ -53,6 +55,10 @@ if [[ "${FLAGS_usepkgonly}" -eq "${FLAGS_TRUE}" ]]; then
   FLAGS_workon="${FLAGS_FALSE}"
 fi
 
+if [[ -n "${FLAGS_dev_builds_sdk}" ]]; then
+  FLATCAR_DEV_BUILDS_SDK="${FLAGS_dev_builds_sdk}"
+fi
+
 . "${BUILD_LIBRARY_DIR}/toolchain_util.sh"
 
 PORTAGE_STABLE_OVERLAY="${REPO_ROOT}/src/third_party/portage-stable"