anchor.diff:  
     # Please keep the version x.y.0.z and do not update to x.y.76.z because the
     # source of the latter disappears much faster.
  -  version = "8.42.76.54";
  +  version = "8.44.0.40";
   
     rpath = stdenv.lib.makeLibraryPath [
       alsaLib
  
positive.code: 
      # Fix the desktop link
      substituteInPlace $out/share/applications/skypeforlinux.desktop \
        --replace /usr/bin/ $out/bin/ \
        --replace /usr/share/ $out/share/
    '';
  
    meta = with stdenv.lib; {
  
negative.code:     if stdenv.hostPlatform.system == "x86_64-linux" then
        fetchurl {
          url = "https://repo.skype.com/deb/pool/main/s/skypeforlinux/skypeforlinux_${version}_amd64.deb";
          sha256 = "08b5nfx1c8czx5nga3zlg60rxnyg2iy627vnaq8cf9dv620vbrw8";
        }
      else
        throw "Skype for linux is not supported on ${stdenv.hostPlatform.system}";
  