anchor.diff:      cp "$out/share/pkgconfig/"* "$out/lib/pkgconfig"
     '';
   
  +  buildInputs = stdenv.lib.optionals stdenv.cc.isClang [ llvmPackages.openmp ];
  +
     checkInputs = [ boost ];
   
     meta = with stdenv.lib; {
  
positive.code:     homepage = "https://gitlab.com/mdds/mdds";
      description = "A collection of multi-dimensional data structure and indexing algorithm";
      platforms = platforms.all;
      broken = stdenv.isDarwin;
      license = licenses.mit;
    };
  }
  
negative.code: { stdenv, fetchurl, boost, llvmPackages }:
  
  stdenv.mkDerivation rec {
    pname = "mdds";
  