anchor.diff:  
       # Fix the desktop link
       substituteInPlace $out/share/applications/skypeforlinux.desktop \
  -      --replace /usr/bin/ $out/bin/ \
  -      --replace /usr/share/ $out/share/
  +      --replace /usr/bin/ $out/bin/
     '';
   
     meta = with stdenv.lib; {
  
positive.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 = "1r2wkaa4ss6b8289db3p012nlhvljbx57hp7jc9n0mp19yphd07l";
        }
      else
        throw "Skype for linux is not supported on ${stdenv.hostPlatform.system}";
  
negative.code: 
    # 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 = "8.44.0.40";
  
    rpath = stdenv.lib.makeLibraryPath [
      alsaLib
  