anchor.diff:  
     propagatedBuildInputs = [
       xlibs.libXcomposite libX11 libxcb libXext libXrender libXi
  -    fontconfig freetype openssl dbus.libs glib udev libxml2 libxslt pcre
  -    zlib libjpeg libpng libtiff sqlite icu
  +    fontconfig freetype openssl dbus.libs glib udev libxml2 libxslt pcre16
  +    zlib libjpeg libpng libtiff sqlite icu harfbuzz
       xcbutil xcbutilimage xcbutilkeysyms xcbutilwm libxkbcommon
     ]
     # Qt doesn't directly need GLU (just GL), but many apps use, it's small and
  
positive.code: 
  , xlibs, libX11, libxcb, libXcursor, libXext, libXrender, libXi
  , xcbutil, xcbutilimage, xcbutilkeysyms, xcbutilwm, libxkbcommon
  , fontconfig, freetype, openssl, dbus, glib, udev, libxml2, libxslt, pcre
  , zlib, libjpeg, libpng, libtiff, sqlite, icu
  
  , coreutils, bison, flex, gdb, gperf, lndir, ruby
  , python, perl, pkgconfig
  
negative.code:     -system-zlib
      -system-libpng
      -system-libjpeg
      -system-harfbuzz
      -system-xcb
      -system-xkbcommon
      -system-pcre
      -openssl-linked
      -dbus-linked
  
  