flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    naersk.url = "github:nix-community/naersk";
    flake-compat = {
      url = "github:ElvishJerricco/flake-compat/add-overrideInputs";
      flake = false;
    };
  };

  outputs = { self, flake-utils, naersk, nixpkgs, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = (import nixpkgs) {
          inherit system;
          config.allowUnfree = true;
        };

        naersk' = pkgs.callPackage naersk { };

      in rec {
        # For `nix build` & `nix run`:
        defaultPackage = naersk'.buildPackage {
          src = ./.;

          nativeBuildInputs = with pkgs; [ pkg-config clang ];
          buildInputs = with pkgs;
            [
              (ffmpeg_6.override {
                ffmpegVariant = "headless";

                withUnfree = true; # for:
                withFdkAac = true;
              })
            ];

          LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
        };

        # For `nix develop`:
        devShell = pkgs.mkShell {
          nativeBuildInputs = with pkgs;
            [ rustc cargo rust-analyzer clippy ]
            ++ defaultPackage.nativeBuildInputs;
          buildInputs = defaultPackage.buildInputs;
        };
      });
}