anchor.diff:       ld: cannot find -lruby-1.8.7-p72
   
      */
  -  buildInputs = [ cmake perl /* ruby */ ];
  +  buildInputs = [ cmake perl /* ruby */ boost ];
   
     preConfigure =
       # Make it so that libsimgrid.so will be found when running programs from
  
positive.code: { fetchurl, stdenv, cmake, perl, ruby }:
  
  stdenv.mkDerivation rec {
    name = "simgrid-3.5";
  
    src = fetchurl {
      url = "https://gforge.inria.fr/frs/download.php/28017/${name}.tar.gz";
      sha256 = "1vd4pvrcyii1nfwyca3kpbwshbc965lfpn083zd8rigg6ydchq8y";
    };
  
    /* FIXME: Ruby currently disabled because of this:
  
negative.code:   patchPhase =
      '' for i in "src/smpi/"*
         do
           test -f "$i" &&
           sed -i "$i" -e's|/bin/bash|/bin/sh|g'
         done
  
  