{
  lib,
  buildGoModule,
}:

buildGoModule {
  pname = "ddnnss";
  version = "1.0";

  src = lib.fileset.toSource {
    root = ./.;
    fileset = lib.fileset.unions [
      ./go.mod
      ./main.go
      ./config.go
      ./source
      ./provider
    ];
  };

  # stdlib only.
  vendorHash = null;

  meta = {
    description = "dynamic domain no-name system service";
    homepage = "https://git.rnrd.eu/ddnnss";
    license = lib.licenses.mpl20;
    mainProgram = "ddnnss";
  };
}