these 2 derivations will be built:
  /nix/store/g314c87l9bn6200i62frxmsm69xqa3bv-nixos-test-driver-pg_hashids.drv
  /nix/store/i30qyv5h66vy46yvaynvk0kby9zhgzii-vm-test-run-pg_hashids.drv