anchor.diff:  
     preConfigure = ''
       export HOME="$PWD"
  -    patchShebangs . 
  +    patchShebangs .
       sed -e 's@epswrite@eps2write@g' -i runlabel.in
       xz -d < ${texinfo.src} | tar --wildcards -x texinfo-'*'/doc/texinfo.tex
       cp texinfo-*/doc/texinfo.tex doc/
  
positive.code: {stdenv, fetchurl
    , freeglut, ghostscriptX, imagemagick, fftw 
    , boehmgc, libGLU, libGL, mesa_noglu, ncurses, readline, gsl, libsigsegv
    , python, zlib, perl, texLive, texinfo, xz
  , darwin
  
negative.code:     description =  "A tool for programming graphics intended to replace Metapost";
      license = licenses.gpl3Plus;
      maintainers = [ maintainers.raskin maintainers.peti ];
      broken = stdenv.isDarwin;  # https://github.com/vectorgraphics/asymptote/issues/69
      platforms = platforms.linux ++ platforms.darwin;
    };
  }
  