# This file defines overlays
{inputs, ...}: {
  # This one brings our custom packages from the 'pkgs' directory
  additions = final: _prev: import ../pkgs final.pkgs;

  # This one contains whatever you want to overlay
  # You can change versions, add patches, set compilation flags, anything really.
  # https://nixos.wiki/wiki/Overlays
  modifications = final: prev: {
    maven363 = prev.maven.overrideAttrs (old: rec {
      pname = "apache-maven";
      version = "3.6.3";
      src = prev.fetchurl {
        url = "mirror://apache/maven/maven-3/${version}/binaries/${pname}-${version}-bin.tar.gz";
        sha256 = "sha256-Jq2R11GzqaUwh676dD9OFqF3QdORWyGc90ESv4ekOMU=";
      };
    });
  };

  # When applied, the unstable nixpkgs set (declared in the flake inputs) will
  # be accessible through 'pkgs.unstable'
  unstable-packages = final: _prev: {
    unstable = import inputs.nixpkgs-unstable {
      system = final.system;
      config.allowUnfree = true;
    };
  };
}