diff --git a/fetcher.nix b/fetcher.nix
index b6c44db..75b770e 100644
--- a/fetcher.nix
+++ b/fetcher.nix
@@ -17,6 +17,7 @@ let
     fetchLFS = false;
     forceFetchGit = false;
     leaveDotGit = null;
+    postCheckout = "";
     rootDir = "";
     sparseCheckout = null;
   };
@@ -67,6 +68,7 @@ decorate (
         else
           nonNullDefault
       ) useFetchGitargsDefaultNonNull != useFetchGitargsDefaultNonNull;
+
     useFetchGitArgsWDPassing = lib.overrideExisting (removeAttrs useFetchGitArgsDefault excludeUseFetchGitArgNames) args;
 
     position = (