anchor.diff:            "https://mirror.cs.uchicago.edu/skype/pool/main/s/skypeforlinux/skypeforlinux_${version}_amd64.deb"
             "https://web.archive.org/web/https://repo.skype.com/deb/pool/main/s/skypeforlinux/skypeforlinux_${version}_amd64.deb"
           ];
  -        sha256 = "gHjgQRdNABO+R+fcDurHDAQtZpckIxLbODM6Txz+LH4=";
  +        sha256 = "PaqlPp+BRS0cH7XI4x1/5HqYti63rQThmTtPaghIQH0=";
         }
       else
         throw "Skype for linux is not supported on ${stdenv.hostPlatform.system}";
  
positive.code: { lib, stdenv, fetchurl, dpkg
  , alsaLib, atk, cairo, cups, curl, dbus, expat, fontconfig, freetype, gdk-pixbuf, glib, glibc, gnome2, gnome3
  , gtk3, libappindicator-gtk3, libnotify, libpulseaudio, libsecret, libv4l, nspr, nss, pango, systemd, wrapGAppsHook, xorg
  , at-spi2-atk, libuuid, at-spi2-core }:
  
  let
  
    # 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 = "8.68.0.100";
  
    rpath = lib.makeLibraryPath [
      alsaLib
  
negative.code:     pango
      stdenv.cc.cc
      systemd
  
      libv4l
      libdrm
      mesa
      libxkbcommon
      xorg.libxkbfile
      xorg.libX11
      xorg.libXcomposite
  