diff --git a/flake.nix b/flake.nix
index 2304a2a..37172cf 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,10 +23,10 @@
 
           # 2. Authenticate if CI environment variables are present
           if [ -n "''${REGISTRY_USERNAME:-}" ] && [ -n "''${REGISTRY_PASSWORD:-}" ]; then
-            echo "CI Environment detected: Logging in to Harbor."
+            echo "CI Environment detected: Logging in to registry."
             ${pkgs.skopeo}/bin/skopeo login gitlab.julian-mutter.de \
-              --username "''${HARBOR_USERNAME}" \
-              --password "''${HARBOR_PASSWORD}"
+              --username "''${REGISTRY_USERNAME}" \
+              --password "''${REGISTRY_PASSWORD}"
           else
             echo "Local Environment detected: Skipping login, relying on existing auth."
           fi