anchor.diff:  
     src = fetchgit {
       url = "git://github.com/JuliaLang/julia.git";
  -    rev = "b842bf4ae4d80f28803ec54f3da412a0248046a9";
  -    sha256 = "4d67f4f4d35c76ea8981198e42feb1c30a50ac7e1e15b752fa41b26ebadcd828";
  +    rev = "e1ba1ebf09da42a5bd7f4ed18f1595ae06032b4c";
  +    sha256 = "187e67a7c6bf44469e0e0dda41072ac8f3a40380ea9364ed07a4cadc08965663";
     };
   
     buildInputs = [ gfortran perl m4 gmp pcre llvm readline zlib
  
positive.code: in
  stdenv.mkDerivation rec {
    pname = "julia";
    date = "20120904";
    name = "${pname}-git-${date}";
  
    grisu_ver = "1.1.1";
    dsfmt_ver = "2.1";
    openblas_ver = "v0.2.2";
    lapack_ver = "3.4.1";
    arpack_ver = "3.1.2";
  
negative.code:   dsfmt_src = fetchurl {
      url = "http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/dSFMT-src-${dsfmt_ver}.tar.gz";
      name = "dsfmt-${dsfmt_ver}.tar.gz";
      sha256 = "bc3947a9b2253a869fcbab8ff395416cb12958be9dba10793db2cd7e37b26899";
    };
    openblas_src = fetchurl {
      url = "https://github.com/xianyi/OpenBLAS/tarball/${openblas_ver}";
  