anchor.diff:      if wm != "" then wm else
       if sessionType == "gnome" then "metacity" else
       if sessionType == "kde" then "none" /* started by startkde */ else
  +    if sessionType == "kde4" then "none" /* started by startkde */ else
       "twm";
   
       
  
positive.code: 
      ### Show a background image.
      # (but not if we're starting a full desktop environment that does it for us)
      ${if sessionType != "kde" then ''
      
        if test -e $HOME/.background-image; then
          ${pkgs.feh}/bin/feh --bg-scale $HOME/.background-image
  
negative.code:       export XDG_CONFIG_DIRS=${pkgs.kdebase}/etc/xdg:${pkgs.kdelibs}/etc/xdg
        export XDG_DATA_DIRS=${pkgs.kdebase}/share
        exec ${pkgs.kdebase}/bin/startkde
  
      '' else if sessionType == "kde4" then ''
  
        # Start KDE.
        export KDEDIRS=$HOME/.nix-profile:/nix/var/nix/profiles/default:${pkgs.kde42.kdelibs}:${pkgs.kde42.kdebase}:${pkgs.kde42.kdebase_runtime}:${pkgs.kde42.kdebase_workspace}
        export XDG_CONFIG_DIRS=${pkgs.kde42.kdelibs}/etc/xdg:${pkgs.kde42.kdebase_runtime}/etc/xdg:${pkgs.kde42.kdebase_workspace}/etc/xdg
        export XDG_DATA_DIRS=${pkgs.kde42.kdelibs}/share:${pkgs.kde42.kdebase}/share:${pkgs.kde42.kdebase_runtime}/share:${pkgs.kde42.kdebase_workspace}/share:${pkgs.shared_mime_info}/share
        exec ${pkgs.kde42.kdebase_workspace}/bin/startkde
  
      '' else ''
  
  