diff --git a/common.sh b/common.sh
index a1e526b0ea..8d22d0aa65 100644
--- a/common.sh
+++ b/common.sh
@@ -242,10 +242,12 @@ load_environment_whitelist() {
 }
 
 load_environment_var() {
-    local file="$1" name="$2"
-    local value
+  local file="$1" name value
+  shift
+  for name in "$@"; do
     value=$(grep "^${name}=" "${file}")
     export "${value}"
+  done
 }
 
 # Find root of source tree
@@ -273,13 +275,14 @@ REPO_MANIFESTS_DIR="${REPO_ROOT}/.repo/manifests"
 
 # Source COREOS_VERSION_ID from manifest.
 if [[ -f "${REPO_MANIFESTS_DIR}/version.txt" ]]; then
-  load_environment_var "${REPO_MANIFESTS_DIR}/version.txt" COREOS_VERSION_ID
+  load_environment_var "${REPO_MANIFESTS_DIR}/version.txt" \
+      COREOS_VERSION_ID COREOS_SDK_VERSION
   # The build id may be provided externally by the build system.
   : ${COREOS_BUILD_ID:=$(date +%Y-%m-%d-%H%M)}
 elif [[ -f "${SCRIPT_LOCATION}/version.txt" ]]; then
-  load_environment_var "${SCRIPT_LOCATION}/version.txt" COREOS_VERSION_ID
   # This only happens in update.zip where we must use the current build id.
-  load_environment_var "${SCRIPT_LOCATION}/version.txt" COREOS_BUILD_ID
+  load_environment_var "${SCRIPT_LOCATION}/version.txt" \
+      COREOS_VERSION_ID COREOS_BUILD_ID COREOS_SDK_VERSION
 else
   die "Unable to locate version.txt"
 fi