anchor.diff:  { stdenv, fetchFromGitHub, qt5, libsForQt5
   , bison, flex, eigen, boost, libGLU_combined, glew, opencsg, cgal
   , mpfr, gmp, glib, pkgconfig, harfbuzz, gettext, freetype, fontconfig
  +, double-conversion, lib3mf, libzip
   }:
   
   stdenv.mkDerivation rec {
  -  version = "2018.04-git";
  -  name = "openscad-${version}";
  +  pname = "openscad";
  +  version = "2019.05";
   
  -#  src = fetchurl {
  -#    url = "http://files.openscad.org/${name}.src.tar.gz";
  -#    sha256 = "0djsgi9yx1nxr2gh1kgsqw5vrbncp8v5li0p1pp02higqf1psajx";
  -#  };
     src = fetchFromGitHub {
       owner = "openscad";
       repo = "openscad";
  -    rev = "179074dff8c23cbc0e651ce8463737df0006f4ca";
  -    sha256 = "1y63yqyd0v255liik4ff5ak6mj86d8d76w436x76hs5dk6jgpmfb";
  +    rev = "${pname}-${version}";
  +    sha256 = "1qz384jqgk75zxk7sqd22ma9pyd94kh4h6a207ldx7p9rny6vc5l";
     };
   
  -  nativeBuildInputs = [ bison flex pkgconfig ];
  +  nativeBuildInputs = [ bison flex pkgconfig gettext qt5.qmake ];
   
     buildInputs = [
       eigen boost glew opencsg cgal mpfr gmp glib
  -    harfbuzz gettext freetype fontconfig
  +    harfbuzz lib3mf libzip double-conversion freetype fontconfig
     ] ++ stdenv.lib.optional stdenv.isLinux libGLU_combined
  -    ++ (with qt5; [qtbase qmake] ++ stdenv.lib.optional stdenv.isDarwin qtmacextras)
  +    ++ (with qt5; [qtbase qtmultimedia] ++ stdenv.lib.optional stdenv.isDarwin qtmacextras)
       ++ (with libsForQt5; [qscintilla])
     ;
   
  
positive.code: 
    # src/lexer.l:36:10: fatal error: parser.hxx: No such file or directory
    enableParallelBuilding = false; # true by default due to qmake
  
    doCheck = false;
  
    postInstall = stdenv.lib.optionalString stdenv.isDarwin ''
      mkdir $out/Applications
  
negative.code:     license = stdenv.lib.licenses.gpl2;
      platforms = stdenv.lib.platforms.unix;
      maintainers = with stdenv.lib.maintainers;
        [ bjornfor raskin the-kenny gebner ];
    };
  }
  