these 2 derivations will be built:
  /nix/store/blb86m35kd7v4dpfn8pv9sdzvc7d7n1f-claude-code-router-3.1.2.drv
  /nix/store/rklm3wb9z57mdxq884nqhjh90ay9ysk0-check-claude-code-router.drv