diff --git a/pkgs/build-support/fetchgit/nix-prefetch-git b/pkgs/build-support/fetchgit/nix-prefetch-git
index 4e6f25b8dd7..f6a317a888a 100755
--- a/pkgs/build-support/fetchgit/nix-prefetch-git
+++ b/pkgs/build-support/fetchgit/nix-prefetch-git
@@ -105,6 +105,10 @@ for arg; do
     fi
 done
 
+if test -n $deepClone; then
+    leaveDotGit=true
+fi
+
 if test -z "$url"; then
     usage
 fi