anchor.diff: -{ stdenv, requireFile, fetchurl, python, token
  +{ stdenv, requireFile, fetchurl, patchelf, python, token
   } :
  +
   let
     version = "2019.1.0";
   
  
positive.code:     sha256 = "1g2nrr12grdlq4chsg15vhfyar7rgyy84d73pfdxb34vi2r1aw6s";
    };
  
    buildInputs = [ python ];
  
    unpackPhase = ''
  
negative.code:     sh install.sh -batch -prefix $out
    '';
  
    postFixup = ''
      #
      # Since version 2019.1 the binaris are dyanmically linked
      for bin in hydra_pmi_proxy molpro.exe mpiexec.hydra; do
        patchelf \
          --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/$bin
      done
    '';
  
    doInstallCheck = true;
  
    installCheckPhase = ''
       #
       # Minimal check if installation runs properly
       #
  
       export MOLCAS_WORKDIR=./
       inp=water
  
       cat << EOF > $inp.inp
       basis=STO-3G
       geom = {
       3
       Angstrom
       O       0.000000  0.000000  0.000000
       H       0.758602  0.000000  0.504284
       H       0.758602  0.000000 -0.504284
       }
       HF
       EOF
  
       # pretend this is a writable home dir
       export HOME=`pwd`
  
       $out/bin/molpro $inp.inp
  
       echo "Check for sucessful run:"
       grep "RHF STATE  1.1 Energy" $inp.out
       echo "Check for correct energy:"
       grep "RHF STATE  1.1 Energy" $inp.out | grep 74.880174
    '';
  
    meta = with stdenv.lib; {
      description = "Quantum chemistry program package";
  