anchor.diff:  { stdenv, fetchgit, gfortran, perl, m4, llvm, gmp, pcre, zlib
    , readline, fftwSinglePrec, fftw, libunwind, suitesparse, glpk, fetchurl
    , ncurses, libunistring, lighttpd, patchelf, openblas, liblapack
  + , tcl, tk
    } :
   let
     realGcc = stdenv.gcc.gcc;
   in
   stdenv.mkDerivation rec {
     pname = "julia";
  -  date = "20121106";
  +  date = "20121122";
     name = "${pname}-git-${date}";
   
     grisu_ver = "1.1.1";
  
positive.code: 
      sed -e 's@ cpp @ gcc -E @g' -i base/Makefile
  
      export LDFLAGS="-L${suitesparse}/lib"
  
      export GLPK_PREFIX="${glpk}/include"
  
      mkdir -p "$out/lib"
      sed -e "s@/usr/local/lib@$out/lib@g" -i deps/Makefile
      sed -e "s@/usr/lib@$out/lib@g" -i deps/Makefile
      
      export makeFlags="$makeFlags PREFIX=$out SHELL=${stdenv.shell}"
  
      export dontPatchELF=1
    '';
  
    preBuild = ''
  
negative.code: 
    src = fetchgit {
      url = "git://github.com/JuliaLang/julia.git";
      rev = "51076ef4c1b269de738b6185865b389601627eb7";
      sha256 = "1hbhxdiymkv0pd4dhr9wbvh1566ivfffhmafsjh8jcwh2f9fz90b";
    };
  
    buildInputs = [ gfortran perl m4 gmp pcre llvm readline zlib
  