diff --git a/lib/fetchers.nix b/lib/fetchers.nix
index e24f6c45d03d..36178ef7acf9 100644
--- a/lib/fetchers.nix
+++ b/lib/fetchers.nix
@@ -202,9 +202,11 @@ rec {
     {
       hashTypes ? defaultHashTypes,
     }:
-    fetcher:
     let
       inherit (commonH hashTypes) hashSet;
+    in
+    fetcher:
+    let
       fArgs = functionArgs fetcher;
 
       normalize = normalizeHash {