these 2 derivations will be built:
  /nix/store/wqv2lfcjxf2m2lp2m7kslap3qgr5ljyg-nixos-test-driver-pg_jsonschema.drv
  /nix/store/zv4kh8kw6z78pwi5vhgiczikckc4mnhm-vm-test-run-pg_jsonschema.drv