anchor.diff:      '';
       homepage = "http://openscad.org/";
       license = stdenv.lib.licenses.gpl2;
  -    platforms = with stdenv.lib.platforms;
  -      linux;
  +    platforms = stdenv.lib.platforms.linux;
       maintainers = with stdenv.lib.maintainers; 
  -      [raskin bjornfor];
  +      [ bjornfor raskin the-kenny ];
     };
   }
  
positive.code: {stdenv, fetchurl, qt4, bison, flex, eigen, boost, mesa, glew, opencsg, cgal
    , mpfr, gmp
    }:
  
  stdenv.mkDerivation rec {
    version = "2013.01";
    name = "openscad-${version}";
  
    src = fetchurl {
  
negative.code:     sha256 = "01r013l8zyfkgmqn05axh3rlfsjwd6j403w5ffl7nby4i2spiw1f";
    };
  
    buildInputs = [ qt4 bison flex eigen boost mesa glew opencsg cgal gmp mpfr ];
  
    configurePhase = ''
      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I$(echo ${eigen}/include/eigen*) "
  