anchor.diff:      sed -e 's@epswrite@eps2write@g' -i runlabel.in
       xz -d < ${texinfo.src} | tar --wildcards -x texinfo-'*'/doc/texinfo.tex
       cp texinfo-*/doc/texinfo.tex doc/
  -    export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${boehmgc}/include/gc"
  +    rm *.tar.gz
  +    configureFlags="$configureFlags --with-latex=$out/share/texmf/tex/latex --with-context=$out/share/texmf/tex/context/third"
     '';
  +
  +  NIX_CFLAGS_COMPILE = [ "-I${boehmgc}/include/gc" ];
   
     postInstall = ''
       mv -v "$out/share/info/asymptote/"*.info $out/share/info/
  
positive.code:   };
    buildInputs = [
     freeglut ghostscriptX imagemagick fftw 
     boehmgc mesa ncurses readline gsl libsigsegv
     python zlib perl texLive texinfo xz
    ];
  in
  
negative.code: {stdenv, fetchurl
    , freeglut, ghostscriptX, imagemagick, fftw 
    , boehmgc, mesa_glu, mesa_noglu, ncurses, readline, gsl, libsigsegv
    , python, zlib, perl, texLive, texinfo, xz
  }:
  let
  