unless (all { isValidPath($_->path) } $c->stash->{build}->buildoutputs->all) {
        $c->response->status(410); # "Gone"
        error($c, "Build " . $c->stash->{build}->id . " is no longer available.");
    }

    gone($c, "Build " . $c->stash->{build}->id . " is no longer available.")
        unless all { isValidPath($_->path) } $c->stash->{build}->buildoutputs->all;

    error($c, "Output is not available.") unless isValidPath $output->path;

    gone($c, "Output is no longer available.") unless isValidPath $output->path;

    if (!isValidPath($path)) {
        $c->response->status(410); # "Gone"
        error($c, "Path " . $path . " is no longer available.");
    }

    gone($c, "Path " . $path . " is no longer available.") unless isValidPath($path);

    error notFound accessDenied

    error notFound gone accessDenied

}
sub gone {
    my ($c, $msg) = @_;
    error($c, $msg, 410);