these 2 derivations will be built:
  /nix/store/l8w3lbfmmghq1x8sfj2f8iv0yp31185d-llm-agents-site.drv
  /nix/store/w8pfpwz3p4z7iqnzwjyc8f5cxmv2k2vx-check-site.drv