sub uri_for {
        my ($controller, $action, @args) = @_;
        return $c->uri_for($c->controller($controller)->action_for($action), @args)->path;
    }
    sub channelUris {
        my ($controller, $bindings) = @_;
        return
            ( "Disallow: " . uri_for($controller, 'closure', $bindings, "*")
            , "Disallow: " . uri_for($controller, 'manifest', $bindings)
            , "Disallow: " . uri_for($controller, 'nar', $bindings, "*")
            , "Disallow: " . uri_for($controller, 'pkg', $bindings, "*")
            , "Disallow: " . uri_for($controller, 'nixexprs', $bindings)
            );
    }

        , "Disallow: /*/nix/closure/*" 
        , "Disallow: /*/channel/*/MANIFEST.bz2" 
        , "Disallow: /*/nar/*" 
        , "Disallow: /*.nixpkg" 
        , "Disallow: /build/*/buildtime-deps" 
        , "Disallow: /build/*/runtime-deps" 
        , "Disallow: /build/*/nixlog/*/tail" 

        , "Disallow: " . uri_for('Build', 'buildtimedeps', ["*"])
        , "Disallow: " . uri_for('Build', 'runtimedeps', ["*"])
        , "Disallow: " . uri_for('Build', 'view_nixlog', ["*"], "*/tail")
        , channelUris('Root', ["*"])
        , channelUris('Project', ["*", "*"])
        , channelUris('Jobset', ["*", "*", "*"])
        , channelUris('Job', ["*", "*", "*", "*"])
        , channelUris('Build', ["*"])