diff --git a/docker/scripts/build-dotfiles.sh b/docker/scripts/build-dotfiles.sh
index f3676b7..e509b47 100755
--- a/docker/scripts/build-dotfiles.sh
+++ b/docker/scripts/build-dotfiles.sh
@@ -8,3 +8,6 @@ DOTFILES_CACHEBUST=$(date +%s > $REPO_ROOT/.dotfiles-cachebust)
 
 # Rebuild the desktop environment
 $REPO_ROOT/docker/scripts/build.sh
+
+# Store build exit code
+echo "exit-code:$?" >> $REPO_ROOT/.dotfiles-cachebust