{ config, pkgs, lib, ... }:
let
  # Select a JDK version
  #
  jdk = pkgs.jdk23;
  #
  # If a more recent OpenJDK version than the bundled JDK is needed.
  #jdk = pkgs.unstable.jdk;
  #jdk = pkgs.unstable.jdk23;
  #
  # If JavaFX with WebKit is required.
  # https://github.com/NixOS/nixpkgs/blob/4b218e54ae22c8b3ad642ff0dec842363c3abd0f/pkgs/top-level/all-packages.nix#L14583-L14588
  #jdk = pkgs.jdk23.override {
  #  enableJavaFX = true;
  #  openjfx_jdk = pkgs.openjfx23.override { withWebKit = true; };
  #};

  # https://github.com/NixOS/nixpkgs/blob/23e89b7da85c3640bbc2173fe04f4bd114342367/pkgs/development/tools/build-managers/gradle/default.nix#L46
  gradle = pkgs.gradle.override {
    java = jdk;
    javaToolchains = [ jdk ];
  };
in
{
  # System-wide installation makes pkgs available at:
  #   /run/current-system/sw/bin/
  # This makes it easier to configure them in Jetbrain's IDE.
  environment.systemPackages = with pkgs; [
    # To use Gradle in IntelliJ:
    # - Project settings > Add and select JDK
    # - `type java` gives `/run/current-system/sw/bin/java`.
    #   - Somehow IntelliJ can't select it
    #   - Thus we use the symlinks destination instead ...
    jdk
    # To use Gradle in IntelliJ:
    # - Settings > Build tools > Gradle > Local installation
    # - `type gradle` gives `/run/current-system/sw/bin/gradle`.
    #   - Somehow IntelliJ can't select it
    #   - Thus we use the symlinks destination instead ...
    gradle
    maven
  ];
}