diff --git a/nixos/roles/laminar/test-config.nix b/nixos/roles/laminar/test-config.nix
index 0ebe384a..8b793bed 100644
--- a/nixos/roles/laminar/test-config.nix
+++ b/nixos/roles/laminar/test-config.nix
@@ -89,7 +89,7 @@ in {
               exitOnError "Cannot pull forward git config." $ exe "/run/wrappers/bin/sudo" "-u" "${user}" "git" "pull" "--ff-only"
               current_commit <- exitOnError "Current system is from a dirty commit." $ readFileBS "/run/current-system/config-commit"
               new_system <- readlink "-f" "/var/cache/gc-links/test-config/nixos-configurations/hera" |> captureTrim
-              new_commit <- readFileBS [i|#{new_system}/config-commit"|]
+              new_commit <- readFileBS [i|#{new_system}/config-commit|]
               is_direct_forward <- ("" ==) <$> (git "log" "-n1" "--oneline" ([i|^#{new_commit}|] :: String) (decodeUtf8 current_commit :: String) |> captureTrim)
               when is_direct_forward do
                 nix_env "-p" "/nix/var/nix/profiles/system" "--set" (decodeUtf8 new_system :: String)