anchor.diff: -{ fetchurl, stdenv, cmake, perl, ruby }:
  +{ fetchurl, stdenv, cmake, perl, ruby, boost }:
   
   stdenv.mkDerivation rec {
  -  name = "simgrid-3.5";
  +  version = "3.11.1";
  +  name = "simgrid-${version}";
   
     src = fetchurl {
  -    url = "https://gforge.inria.fr/frs/download.php/28017/${name}.tar.gz";
  -    sha256 = "1vd4pvrcyii1nfwyca3kpbwshbc965lfpn083zd8rigg6ydchq8y";
  +    url = "https://gforge.inria.fr/frs/download.php/33686/${name}.tar.gz";
  +    sha256 = "0mkrzxpf42lmn96khfl1791vram67r2nqsgmppd2yil889nyz5kp";
     };
   
     /* FIXME: Ruby currently disabled because of this:
  
positive.code:      ld: cannot find -lruby-1.8.7-p72
  
     */
    buildInputs = [ cmake perl /* ruby */ ];
  
    preConfigure =
      # Make it so that libsimgrid.so will be found when running programs from
  
negative.code:   patchPhase =
      '' for i in "src/smpi/"*
         do
           test -f "$i" &&
           sed -i "$i" -e's|/bin/bash|/bin/sh|g'
         done
  
  