anchor.diff:    };
   
     buildInputs = [ gfortran perl m4 gmp pcre llvm blas liblapackShared readline 
  -    fftw fftwSinglePrec libunwind suitesparse glpk ncurses
  +    fftw fftwSinglePrec libunwind suitesparse glpk ncurses libunistring
       ];
   
     configurePhase = ''
  
positive.code: { stdenv, fetchgit, gfortran, perl, m4, llvm, gmp, pcre, blas, liblapack
   , readline, fftwSinglePrec, fftw, libunwind, suitesparse, glpk, fetchurl
   , ncurses
   } :
  let
    liblapackShared = liblapack.override{shared=true;};
  
negative.code:     sed -e '/cd SuiteSparse-SYSTEM/,+1s@find /lib /usr/lib /usr/local/lib@find ${suitesparse}/lib@' -i external/Makefile
  
      ${if realGcc ==null then "" else 
      ''export NIX_LDFLAGS="$NIX_LDFLAGS -L${realGcc}/lib -L${realGcc}/lib64 -lpcre -llapack -lm -lfftw3f -lfftw3 -lglpk -lunistring "''}
  
      sed -e 's@ cpp @ gcc -E @g' -i base/Makefile
    '';
  