diff --git a/flake.nix b/flake.nix
index b560e04..ef1b106 100644
--- a/flake.nix
+++ b/flake.nix
@@ -72,7 +72,7 @@
                   _flake_metadata="$(nix flake metadata git+file://$PWD?rev="$(git rev-parse HEAD)" --json)"
                   export TF_VAR_flake_rev="$(echo "$_flake_metadata" | jq .locked.rev -r)"
                   export TF_VAR_flake_sha="$(echo "$_flake_metadata" | jq .locked.narHash -r)"
-                  export TF_VAR_flake_ref="$(git name-rev --name-only HEAD)"
+                  export TF_VAR_flake_ref="$(git rev-parse --abbrev-ref HEAD)"
                   case "$1" in
                   "env")
                   shift 1