diff --git a/entrypoint.sh b/entrypoint.sh
index 70f744c..8ab80ce 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -57,7 +57,7 @@ main() {
     ## $GITHUB_SERVER_URL is set as a default environment variable in all workflows, default is https://github.com
     git config --global url."$GITHUB_SERVER_URL/".insteadOf "git@${GITHUB_HOSTNAME}":
     git config --global --add safe.directory "*"
-    if [[ "$BUILD_THEMES" ]]; then
+    if ${BUILD_THEMES}; then
         echo "Fetching themes"
         git submodule update --init --recursive
     fi