{ pkgs }:

let 
  wp-set = pkgs.writeShellScriptBin "wp-set" ''
    if [ -n "$1" ] && [ -e "$1" ]; then
      rm "$HOME/.config/wallpaper."*

      cp "$1" "$HOME/.config/wallpaper.''${1##*.}"
    fi

    ${pkgs.xwallpaper}/bin/xwallpaper --zoom "$HOME/.config/wallpaper."*
  '';

  wp-rand = pkgs.writeShellScriptBin "wp-rand" ''
    ${wp-set}/bin/wp-set $(ls -1Ad "$HOME/Pictures/Wallpapers/"* | shuf | head -n 1)
  '';

  wp = pkgs.writeShellScriptBin "wp" ''
    nsxiv="${pkgs.nsxiv}/bin/nsxiv"
    wpset="${wp-set}/bin/wp-set"

    $wpset "$($nsxiv -bfort "$HOME/Pictures/Wallpapers" | sed 1q)"
  '';
in pkgs.symlinkJoin {
  name = "wp";
  paths = [
    wp
    wp-rand
    wp-set
  ];
}