}

    public boolean isDone() {
        int state = status.get();
        return state == EXECUTED || state == FAILED || state == SKIPPED;
    }

    public Stream<BuildStep> allPredecessors() {
        return preds(new HashSet<>()).stream();
    }

    private Set<BuildStep> preds(Set<BuildStep> preds) {
        if (preds.add(this)) {
            this.predecessors.forEach(n -> n.preds(preds));