with import <nixpkgs> {}; 
  stdenvNoCC.mkDerivation {
    name = "vaspi-build-env";
    
    buildInputs = [
        pkg-config
	lapack
	gfortran6
	(openmpi.override { stdenv = gcc6Stdenv; gfortran = gfortran6; })
	(blas-reference.override { stdenv = gcc6Stdenv; })
	(fftwMpi.override { stdenv = gcc6Stdenv; gfortran = gfortran6; })
    ];
  }