anchor.diff:  , mkDerivation
   , fetchFromGitHub
   , fluxbox
  +, hicolor-icon-theme
   , libarchive
   , numlockx
   , qmake
  
positive.code: 
    buildInputs = [
      fluxbox # window manager for Lumina DE
      libarchive # make `bsdtar` available for lumina-archiver
      numlockx # required for changing state of numlock at login
      qtbase
  
negative.code:     done
    '';
  
    postInstall = ''
      for theme in lumina-icons material-design-{dark,light}; do
        gtk-update-icon-cache $out/share/icons/$theme
      done
    '';
  
    qmakeFlags = [
      "LINUX_DISTRO=NixOS"
      "CONFIG+=WITH_I18N"
  