these 3 derivations will be built:
  /nix/store/q310q0kgrzbf0z4dq69s3k294s15jyrq-docs-site-main-site.conf.drv
  /nix/store/2fkls5lf34a8ffg6lfjdf92rp1sq5yhw-docs-site-main-nginx.conf.drv
  /nix/store/s47872f2b83xi1q7fbqs0443rg6vs7v4-docs-backend-test.drv