anchor.diff:  , gobject-introspection
   , vala
   , fetchpatch
  -, withQt4 ? false
  -, qt4
   , withQt5 ? false
   , qtbase
   , yelp-tools
  
positive.code:     "--sysconfdir=/etc"
      "--disable-tests"
      "--disable-dmrc"
    ] ++ optional withQt4 "--enable-liblightdm-qt"
      ++ optional withQt5 "--enable-liblightdm-qt5";
  
    installFlags = [
      "sysconfdir=${placeholder "out"}/etc"
  
negative.code:     libxklavier
      pam
      polkit
    ] ++ optional withQt5 qtbase;
  
    patches = [
      # Adds option to disable writing dmrc files
  