anchor.diff:    };
   
     # nativeBuildInputs = [
  -  #   pkgs.meson
  +  #   meson
     #   ninja
     # ];
   
  
positive.code:     gst-plugins-base
      gstreamer
      ncurses
      pythonPackages.python
      pythonPackages.pygobject
      pythonPackages.wrapPython
    ];
  
    patches = [
  
negative.code: let
    sources = {
      "1.12" = {
        version = "1.12.4";
        sha256 = "20ce6af6615c9a440c1928c31259a78226516d06bf1a65f888c6d109826fa3ea";
      };
    };
  
  