github.com_the-nix-way_dev-templates/clojure/flake.nix

{
  description = "A Nix-flake-based Clojure development environment";

  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1";

  outputs =
    inputs:

    let
      javaVersion = 23; # Change this value to update the whole stack

      supportedSystems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];
      forEachSupportedSystem =
        f:
        inputs.nixpkgs.lib.genAttrs supportedSystems (
          system:
          f {
            pkgs = import inputs.nixpkgs {
              inherit system;
              overlays = [ inputs.self.overlays.default ];
            };
          }
        );
    in
    {
      overlays.default =
        final: prev:
        let
          jdk = prev."jdk${toString javaVersion}";
        in
        {
          boot = prev.boot.override { inherit jdk; };
          clojure = prev.clojure.override { inherit jdk; };
          leiningen = prev.leiningen.override { inherit jdk; };
        };

      devShells = forEachSupportedSystem (
        { pkgs }:
        {
          default = pkgs.mkShell {
            packages = with pkgs; [
              boot
              clojure
              leiningen
            ];
          };
        }
      );
    };
}