anchor.diff:      (stdenv.lib.optionalString stdenv.isFreeBSD "mkdir -p $out/lib ;")
       + ''
       install ${dashD} -m755 libblas.a "$out/lib/libblas.a"
  -    install ${dashD} -m755 libblas.so.3.0.3 "$out/lib/libblas.so.3.0.3"
  -    ln -s libblas.so.3.0.3 "$out/lib/libblas.so.3"
  -    ln -s libblas.so.3.0.3 "$out/lib/libblas.so"
  +    install ${dashD} -m755 libblas.so.${version} "$out/lib/libblas.so.${version}"
  +    ln -s libblas.so.${version} "$out/lib/libblas.so.3"
  +    ln -s libblas.so.${version} "$out/lib/libblas.so"
     '';
   
     meta = {
  
positive.code: { stdenv, fetchurl, gfortran }:
  
  stdenv.mkDerivation rec {
    name = "blas-3.5.0";
    src = fetchurl {
      url = "http://www.netlib.org/blas/${name}.tgz";
      sha256 = "096a3apnh899abjymjjg8m34hncagkzp9qxw08cms98g71fpfzgg";
  
negative.code:     echo >>make.inc "ARCH = gfortran"
      echo >>make.inc "ARCHFLAGS = -shared -o"
      echo >>make.inc "RANLIB = echo"
      echo >>make.inc "BLASLIB = libblas.so.${version}"
    '';
  
    buildPhase = ''
  