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