diff --git a/build_library/sysext_prod_builder b/build_library/sysext_prod_builder
index a077ce4cfb6..8545119e937 100755
--- a/build_library/sysext_prod_builder
+++ b/build_library/sysext_prod_builder
@@ -56,7 +56,10 @@ create_prod_sysext() {
 
   info "${msg}."
   
-  sudo "${SCRIPTS_DIR}/build_sysext" \
+  # Pass the build ID extracted from root FS to build_sysext. This prevents common.sh
+  #   in build_sysext to generate a (timestamp based) build ID during a DEV build of a
+  #   release tag (which breaks its version check).
+  sudo "FLATCAR_BUILD_ID=$FLATCAR_BUILD_ID" "${SCRIPTS_DIR}/build_sysext" \
             --board="${BOARD}" \
             --image_builddir="${workdir}/sysext-build" \
             --squashfs_base="${base_sysext}" \
@@ -104,6 +107,13 @@ mkdir "${sysext_workdir}" "${sysext_output_dir}"
 info "creating temporary base OS squashfs"
 sudo mksquashfs "${root_fs_dir}" "${sysext_base}" -noappend -xattrs-exclude '^btrfs.'
 
+# Set build ID from root fs for later use by create_prod_sysext().
+#   This prevents common.sh in build_sysext to generate its own build ID which might cause
+#   its build ID check to fail.
+unset FLATCAR_BUILD_ID
+FLATCAR_BUILD_ID=$(source "${root_fs_dir}/usr/lib/os-release" && echo -n "$BUILD_ID")
+export FLATCAR_BUILD_ID
+
 # Build sysexts on top of root fs and mount sysexts' squashfs + pkginfo squashfs
 # for combined overlay later.
 prev_pkginfo=""