diff --git a/fetcher.nix b/fetcher.nix
index 6e294e6..5641a69 100644
--- a/fetcher.nix
+++ b/fetcher.nix
@@ -7,7 +7,7 @@
   repoRevToNameMaybe,
   fetchgit,
   fetchzip,
-}:
+}@args:
 
 let
 
@@ -36,6 +36,9 @@ let
 
   decorate = f: lib.makeOverridable (adjustFunctionArgs f);
 
+  fetchzip =
+    if args.fetchzip ? override then args.fetchzip.override { withUnzip = false; } else args.fetchzip;
+
 in
 
 decorate (
@@ -105,14 +108,7 @@ decorate (
 
     # We prefer fetchzip in cases we don't need submodules as the hash
     # is more stable in that case.
-    fetcher =
-      if useFetchGit then
-        fetchgit
-      # fetchzip may not be overridable when using external tools, for example nix-prefetch
-      else if fetchzip ? override then
-        fetchzip.override { withUnzip = false; }
-      else
-        fetchzip;
+    fetcher = if useFetchGit then fetchgit else fetchzip;
 
     fetcherArgs =
       finalAttrs: