diff --git a/common.sh b/common.sh
index 7928df1ef5..23509f7945 100644
--- a/common.sh
+++ b/common.sh
@@ -264,7 +264,7 @@ load_environment_var() {
   shift
   for name in "$@"; do
     value=$(grep "^${name}=" "${file}" | sed 's|"||g')
-    export "${value}"
+    [[ -n "${value}" ]] && export "${value}"
   done
 }
 
@@ -299,7 +299,8 @@ if [[ -f "${REPO_MANIFESTS_DIR}/version.txt" ]]; then
     FLATCAR_VERSION_ID FLATCAR_SDK_VERSION
   else
     load_environment_var "${REPO_MANIFESTS_DIR}/version.txt" \
-    FLATCAR_VERSION_ID FLATCAR_BUILD_ID FLATCAR_SDK_VERSION
+    FLATCAR_VERSION_ID FLATCAR_BUILD_ID FLATCAR_SDK_VERSION \
+    FLATCAR_DEV_BUILDS FLATCAR_DEV_BUILDS_SDK
     # 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.
@@ -309,7 +310,8 @@ if [[ -f "${REPO_MANIFESTS_DIR}/version.txt" ]]; then
 elif [[ -f "${SCRIPT_LOCATION}/version.txt" ]]; then
   # This only happens in update.zip where we must use the current build id.
   load_environment_var "${SCRIPT_LOCATION}/version.txt" \
-      FLATCAR_VERSION_ID FLATCAR_BUILD_ID FLATCAR_SDK_VERSION
+      FLATCAR_VERSION_ID FLATCAR_BUILD_ID FLATCAR_SDK_VERSION \
+      FLATCAR_DEV_BUILDS FLATCAR_DEV_BUILDS_SDK
 else
   die "Unable to locate version.txt"
 fi
diff --git a/set_version b/set_version
new file mode 100755
index 0000000000..717f48403c
--- /dev/null
+++ b/set_version
@@ -0,0 +1,91 @@
+#!/bin/bash
+
+set -euo pipefail
+
+DEFAULT_BASE_URL="https://storage.googleapis.com/flatcar-jenkins"
+DEV_BOARD_URL="${DEFAULT_BASE_URL}/developer"
+DEV_SDK_URL="${DEFAULT_BASE_URL}/developer/sdk"
+FILE=~/trunk/.repo/manifests/version.txt
+FLATCAR_DEV_BUILDS_SDK=""
+FLATCAR_SDK_VERSION=""
+FLATCAR_DEV_BUILDS=""
+FLATCAR_VERSION=""
+FLATCAR_VERSION_ID=""
+
+# To keep this script usable outside of the SDK chroot, do not include common.sh here.
+
+if [[ $# = 0 ]] || [[ "$1" = "-h" ]] || [[ "$1" = "--help" ]]; then
+  echo "Updates ${FILE} with new values to specify which binary packages to use
+Usage: $0 FLAGS...
+  --board-version (VERSION|BOARD/CHANNEL-nightly): Set FLATCAR_VERSION=VERSION and
+                                                   FLATCAR_VERSION_ID=VERSION where VERSION can
+                                                   be resolved by looking up the latest build
+                                                   referenced by
+                                                   ${DEV_BOARD_URL}/boards/BOARD/CHANNEL-nightly.txt
+  --dev-board:                                     Set FLATCAR_DEV_BUILDS=${DEV_BOARD_URL}
+  --no-dev-board:                                  Remove existing FLATCAR_DEV_BUILDS
+  --sdk-version VERSION:                           Set FLATCAR_SDK_VERSION=VERSION
+  --dev-sdk:                                       Set FLATCAR_DEV_BUILDS_SDK=${DEV_SDK_URL}
+  --no-dev-sdk:                                    Remove existing FLATCAR_DEV_BUILDS_SDK
+  --file FILE:                                     Modify another file than ${FILE}, useful if run
+                                                   outside of the SDK chroot. If /dev/stdout or
+                                                   /dev/stderr is used, only new values are printed.
+"
+  exit 1
+fi
+
+while [[ $# -gt 0 ]]; do
+  ARG="$1"
+  shift
+  case "${ARG}" in
+    --board-version)
+      VAL="$1"
+      shift
+      if [[ "${VAL}" == */*-nightly ]]; then
+        VAL=$(curl -s -S -f -L "${DEV_BOARD_URL}/boards/${VAL}.txt")
+      fi
+      FLATCAR_VERSION="${VAL}"
+      FLATCAR_VERSION_ID="${VAL}"
+      ;;
+    --dev-board)
+      FLATCAR_DEV_BUILDS="${DEV_BOARD_URL}"
+      ;;
+    --no-dev-board)
+      FLATCAR_DEV_BUILDS=no
+      ;;
+    --sdk-version)
+      FLATCAR_SDK_VERSION="$1"
+      shift
+      ;;
+    --dev-sdk)
+      FLATCAR_DEV_BUILDS_SDK="${DEV_SDK_URL}"
+      ;;
+    --no-dev-sdk)
+      FLATCAR_DEV_BUILDS_SDK=no
+      ;;
+    --file)
+      FILE="$1"
+      shift
+      ;;
+    *)
+      echo "Unkown argument ${ARG}"
+      exit 1
+      ;;
+  esac
+done
+
+if [[ "${FILE}" != "/dev/stdout" ]] && [[ "${FILE}" != "/dev/stderr" ]]; then
+  [[ -n "${FLATCAR_VERSION}" ]] && sed -i "/FLATCAR_VERSION=.*/d" "${FILE}"
+  [[ -n "${FLATCAR_VERSION_ID}" ]] && sed -i "/FLATCAR_VERSION_ID=.*/d" "${FILE}"
+  [[ -n "${FLATCAR_DEV_BUILDS}" ]] && sed -i "/FLATCAR_DEV_BUILDS=.*/d" "${FILE}"
+  [[ -n "${FLATCAR_SDK_VERSION}" ]] && sed -i "/FLATCAR_SDK_VERSION=.*/d" "${FILE}"
+  [[ -n "${FLATCAR_DEV_BUILDS_SDK}" ]] && sed -i "/FLATCAR_DEV_BUILDS_SDK=.*/d" "${FILE}"
+fi
+
+{
+  [[ -n "${FLATCAR_VERSION}" ]] && echo "FLATCAR_VERSION=${FLATCAR_VERSION}"
+  [[ -n "${FLATCAR_VERSION_ID}" ]] && echo "FLATCAR_VERSION_ID=${FLATCAR_VERSION_ID}"
+  [[ -n "${FLATCAR_DEV_BUILDS}" ]] && [[ "${FLATCAR_DEV_BUILDS}" != no ]] && echo "FLATCAR_DEV_BUILDS=${FLATCAR_DEV_BUILDS}"
+  [[ -n "${FLATCAR_SDK_VERSION}" ]] && echo "FLATCAR_SDK_VERSION=${FLATCAR_SDK_VERSION}"
+  [[ -n "${FLATCAR_DEV_BUILDS_SDK}" ]] && [[ "${FLATCAR_DEV_BUILDS_SDK}" != no ]] && echo "FLATCAR_DEV_BUILDS_SDK=${FLATCAR_DEV_BUILDS_SDK}"
+} >> "${FILE}"