{
  flake.modules.homeManager.base =
    { pkgs, ... }:
    {
      home.packages = [
        (pkgs.writeShellApplication {
          name = "build";

          text = ''
            test -r book/index.adoc && exec build-adoc "$@"
            test -x build && exec ./build "$@"
          '';
        })
      ];
    };
}