anchor.diff:  
     src = fetchgit {
       url = "git://git.cinelerra-cv.org/j6t/cinelerra.git";
  -    rev = "01dc4375a0fb65d10dd95151473d0e195239175f";
  -    sha256 = "0grz644vrnajhxn96x05a3rlwrbd20yq40sw3y5yg7bvi96900gf";
  +    # 2.3
  +    #rev = "58ef118e63bf2fac8c99add372c584e93b008bae";
  +    #sha256 = "1wx8c9rvh4y7fgg39lb02cy3sanms8a4fayr70jbhcb4rp691lph";
  +    # master 22 nov 2016
  +    #rev = "dbc22e0f35a9e8c274b06d4075b51dc9bace34aa";
  +    #sha256 = "0c76j98ws1x2s5hzcdlykxm2bi7987d9nanka428xj62id0grla5";
  +
  +    # j6t/cinelerra.git
  +    rev = "454be60e201c18c1fc3f1f253a6d2184fcfc94c4";
  +    sha256 = "1n4kshqhgnr7aivsi8dgx48phyd2nzvv4szbc82mndklvs9jfb7r";
     };
   
     # touch config.rpath: work around bug in automake 1.10 ?
  
positive.code: , pkgconfig, faad2, faac, a52dec, alsaLib, fftw, lame, libavc1394
  , libiec61883, libraw1394, libsndfile, libvorbis, libogg, libjpeg
  , libtiff, freetype, mjpegtools, x264, gettext, openexr
  , libXext, libXxf86vm, libXv, libXi, libX11, xextproto, libtheora, libpng
  , libdv, libuuid, file, nasm, perl }:
  
  stdenv.mkDerivation {
    name = "cinelerra-git";
  
negative.code:       a52dec alsaLib   fftw lame libavc1394 libiec61883
        libraw1394 libsndfile libvorbis libogg libjpeg libtiff freetype
        mjpegtools x264 gettext openexr
        libXext libXxf86vm libXv libXi libX11 libXft xextproto
        libtheora libpng libdv libuuid
        nasm
        perl
        fontconfig intltool
      ];
  
    enableParallelBuilding = true;
  
    meta = {
      description = "Video Editor";
  