anchor.diff:  in
   stdenv.mkDerivation rec {
     name = "keybase-gui-${version}";
  -  version = "1.0.44-20180223200436.9a9ccec79";
  +  version = "2.3.0-20180627160031.8e0438e6fb";
     src = fetchurl {
       url = "https://s3.amazonaws.com/prerelease.keybase.io/linux_binaries/deb/keybase_${version}_amd64.deb";
  -    sha256 = "0dmi0fw39924kpahlsk853hbmpy8a6nj78lrh1wharayjpvj6jv3";
  +    sha256 = "0xaxxjdfdmgv0wfy75dspfa0a7cdwdpphyy6my9vw82v8jxl3ffx";
     };
     phases = ["unpackPhase" "installPhase" "fixupPhase"];
     unpackPhase = ''
  
positive.code:     gdk_pixbuf
      glib
      gnome2.GConf
      gtk2
      libnotify
      nspr
      nss
  
negative.code: { stdenv, fetchurl, buildFHSUserEnv, writeTextFile, alsaLib, atk, cairo, cups
  , dbus, expat, fontconfig, freetype, gcc, gdk_pixbuf, glib, gnome2, gtk3
  , libnotify, nspr, nss, pango, systemd, xorg, utillinuxMinimal }:
  
  let
  