diff --git a/pkgs/build-support/fetchgithub/default.nix b/pkgs/build-support/fetchgithub/default.nix
index a2498700b545..15632d30f744 100644
--- a/pkgs/build-support/fetchgithub/default.nix
+++ b/pkgs/build-support/fetchgithub/default.nix
@@ -28,7 +28,7 @@ let
   useFetchGit = fetchSubmodules || (leaveDotGit == true) || deepClone || forceFetchGit || (sparseCheckout != []);
   # We prefer fetchzip in cases we don't need submodules as the hash
   # is more stable in that case.
-  fetcher = if useFetchGit then fetchgit else fetchzip;
+  fetcher = if useFetchGit then fetchgit else fetchzip.override { withUnzip = false; };
   privateAttrs = lib.optionalAttrs private {
     netrcPhase = ''
       if [ -z "''$${varBase}USERNAME" -o -z "''$${varBase}PASSWORD" ]; then