anchor.diff:  with stdenv.lib;
   
   let
  +  python = python2;
     buildType = "release";
   
     inherit (importJSON ./upstream-info.json) version extpackRev extpack main;
  
positive.code: , which, alsaLib, curl, libvpx, gawk, nettools, dbus
  , xorriso, makeself, perl, pkgconfig
  , javaBindings ? false, jdk ? null
  , pythonBindings ? false, python ? null
  , enableExtensionPack ? false, requireFile ? null, patchelf ? null, fakeroot ? null
  , pulseSupport ? false, libpulseaudio ? null
  , enableHardening ? false
  
negative.code: 
    buildInputs =
      [ iasl dev86 libxslt libxml2 xproto libX11 libXext libXcursor libIDL
        libcap glib lvm2 alsaLib curl libvpx pam xorriso makeself perl
        pkgconfig which libXmu libpng patchelfUnstable ]
      ++ optional javaBindings jdk
      ++ optional pythonBindings python
  