these 3 derivations will be built:
  /nix/store/ad15fxd2cndhsdjbv02gy3mligs5nk84-docs-site-main-site.conf.drv
  /nix/store/qkpfds8j3805m0ha3c7m3yj5783bvi92-docs-site-main-nginx.conf.drv
  /nix/store/45pjcyawsmc291044cnjq8nygj2222l6-docs-backend-test.drv