diff --git a/pkgs/tools/package-management/nix-update-source/default.nix b/pkgs/tools/package-management/nix-update-source/default.nix
index 08b5dcb319c..06ac8203f82 100644
--- a/pkgs/tools/package-management/nix-update-source/default.nix
+++ b/pkgs/tools/package-management/nix-update-source/default.nix
@@ -1,12 +1,12 @@
 { lib, pkgs, fetchFromGitHub, python3Packages, nix-prefetch-scripts }:
 python3Packages.buildPythonApplication rec {
-  version = "0.2.2";
+  version = "0.2.1";
   name = "nix-update-source-${version}";
   src = fetchFromGitHub {
     owner = "timbertson";
     repo = "nix-update-source";
     rev = "version-${version}";
-    sha256 = "0liigkr37ib2xy269bcp53ivpir4mpg6lzwnfrsqc4kbkz3l16gg";
+    sha256 = "1w3aj0kjp8zhxkzqxnm5srrsqsvrmxhn4sqkr4kjffh61jg8jq8a";
   };
   propagatedBuildInputs = [ nix-prefetch-scripts ];
   passthru = {
@@ -20,7 +20,7 @@ python3Packages.buildPythonApplication rec {
         fetchFn = builtins.getAttr json.fetch.fn fetchers;
         src = fetchFn json.fetch.args;
       in
-      json // json.fetch // { inherit src; };
+      json // { inherit src; };
   };
   meta = {
     description = "Utility to autimate updating of nix derivation sources";