anchor.diff:      enableParallelBuilding = true;
   
       preBuild = ''
  -      ln -s ${ga_src} src/tools/ga-5.6.3.tar.gz
  +      ln -s ${ga_src} src/tools/ga-${versionGA}.tar.gz
   
   
         export NWCHEM_TOP="`pwd`"
  
positive.code: { stdenv, pkgs, fetchFromGitHub, which, openssh, gcc, gfortran, perl, gnumake
  , mpi ? pkgs.openmpi, openblas, python, tcsh, git, bash, automake, autoconf, libtool, makeWrapper } :
  let
    version = "6.8";
    versionGA = "5.6.3"; # Fixed by nwchem
  
    ga_src = fetchFromGitHub {
      owner = "GlobalArrays";
      repo = "ga";
      rev = "v${versionGA}";
      sha256 = "0dgrli9rdxffzl0nd3998fbnlnlibx7ahid2v0nhis1r1i71k1dn";
    };
  
  in stdenv.mkDerivation {
  
negative.code: 
  
        # Overwrite script, skipping the download
        echo -e '#!/bin/sh\n cd ga-${versionGA};autoreconf -ivf' > src/tools/get-tools-github
  
        patchShebangs ./
  
  