anchor.diff:      [
         gfortran perl m4 gmp pcre llvm readline zlib
         fftw fftwSinglePrec libunwind suitesparse glpk ncurses libunistring patchelf
  -      openblas tcl tk xproto libX11 git mpfr which
  +      arpack openblas tcl tk xproto libX11 git mpfr which
       ];
   
     makeFlags =
  
positive.code: 
    dsfmt_ver = "2.2";
    grisu_ver = "1.1.1";
    arpack_ver = "3.1.5";
    utf8proc_ver = "1.1.6";
  
    dsfmt_src = fetchurl {
  
negative.code:     ln -s "${openblas}/lib/libopenblas.so" "$out/lib/julia/libblas.so"
      ln -s "${openblas}/lib/libopenblas.so" "$out/lib/julia/liblapack.so"
      ln -s "${suitesparse}/lib/libsuitesparse.so" "$out/lib/julia/libsuitesparse.so"
      ln -s "${arpack}/lib/libarpack.so" "$out/lib/julia/libarpack.so"
      for i in umfpack cholmod amd camd colamd spqr; do
        ln -s libsuitesparse.so "$out/lib/julia/lib$i.so";
      done
  