fhs.nix

{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system:
    let
      pkgs = nixpkgs.legacyPackages.${system};
      overriddenJDK = pkgs.jdk8; # Change this to the desired JDK version
      devEnv = (pkgs.buildFHSUserEnv {
        name = "fhs";
        targetPkgs = pkgs: (with pkgs; [
          overriddenJDK
          libsodium
          (scala_2_13.override { jre = overriddenJDK; })
          (sbt.override { jre = overriddenJDK; })
        ]);
      }).env;
    in {
      devShell = devEnv;
    }
  );
}