{ pkgs, ... }:
let
  notif = pkgs.writeShellScriptBin "notif" # bash
    ''
      # Shell script to send custom notifications
      # Usage: notif "sender_id" "message" ["description"]
      NOTIF_FOLDER="/tmp/notif"
      sender_id=$1 # To overwrite existing notifications
      title=$2
      description=$3

      [[ -d "$NOTIF_FOLDER" ]] || mkdir $NOTIF_FOLDER
      [[ -f "$NOTIF_FOLDER/$sender_id" ]] || echo "0" > "$NOTIF_FOLDER/$sender_id"

      old_notification_id=$(cat "$NOTIF_FOLDER/$sender_id")

       ${pkgs.libnotify}/bin/notify-send \
      --replace-id="$old_notification_id" --print-id \
      --app-name="$sender_id" \
      "$title" \
      "$description" \
      > "$NOTIF_FOLDER/$sender_id"
    '';

in { home.packages = [ pkgs.libnotify notif ]; }