Revert "gup: 0.5.5 -> 0.6.0 and derivation update"

This reverts commit a59c3038cd due to
use of importJSON.

pkgs/development/tools/build-managers/gup/default.nix

@@ -1,21 +1,21 @@
-{ stdenv, fetchFromGitHub, lib, pythonPackages, nix-update-source, curl }:
+{ stdenv, fetchFromGitHub, lib, python, which }:
+let
+  version = "0.5.5";
+  src = fetchFromGitHub {
+    sha256 = "12yv0j333z6jkaaal8my3jx3k4ml9hq8ldis5zfvr8179d4xah7q";
+    rev = "version-${version}";
+    repo = "gup";
+    owner = "timbertson";
+  };
+in
 import ./build.nix
-  { inherit stdenv lib pythonPackages; }
-  { inherit (nix-update-source.fetch ./src.json) src version;
+  { inherit stdenv lib python which; }
+  { inherit src version;
     meta = {
-      homepage = https://github.com/timbertson/gup/;
+      inherit (src.meta) homepage;
       description = "A better make, inspired by djb's redo";
       license = stdenv.lib.licenses.lgpl2Plus;
       maintainers = [ stdenv.lib.maintainers.timbertson ];
       platforms = stdenv.lib.platforms.all;
     };
-    passthru = {
-      updateScript = ''
-        set -e
-        echo
-        cd ${toString ./.}
-        ${nix-update-source}/bin/nix-update-source --prompt version src.json
-        ./build.nix.gup build.nix
-      '';
-    };
   }