{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";
    agg.url = "github:yvan-sraka/agg";
  };

  outputs = { self, nixpkgs, utils, agg }:
    utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
        agg' = agg.defaultPackage.${system};
      in {
        devShell = with pkgs;
          mkShell {
            buildInputs =
              [ agg' asciinema asciinema-scenario gifsicle ffmpeg fira-code ];
          };
      });
}