anchor.diff:  in
   
   stdenv.mkDerivation rec {
  -  name = "gst-plugins-bad-1.8.1";
  +  name = "gst-plugins-bad-1.8.2";
   
     src = fetchurl rec {
       url = "https://gstreamer.freedesktop.org/src/gst-plugins-bad/${name}.tar.xz";
       sha256Url = "${url}.sha256sum";
  -    sha256 = "0bbd58f363734fc0c4a620b2d6fb01d427fdafdbda7b90b4e15d03b751ca40f5";
  +    sha256 = "d7995317530c8773ec088f94d9320909d41da61996b801ebacce9a56af493f97";
     };
   
     nativeBuildInputs = [
  -    python
  +    pythonPackages.python
     ];
   
     buildInputs = [
  
positive.code: 
    postPatch =
      /* tests are slower than upstream expects */ ''
      	sed -e 's:/\* tcase_set_timeout.*:tcase_set_timeout (tc_chain, 5 * 60);:' \
      		-i tests/check/elements/audiomixer.c
      '';
  
    configureFlags = [
  
negative.code: { stdenv
  , fetchurl
  , pythonPackages
  
  , bzip2
  , curl
  