these 2 derivations will be built:
  /nix/store/bdxw7xpdxx4518ds15153s1mipr8aid4-nixos-test-driver-pg_graphql.drv
  /nix/store/ff3rnr7jyizgbhkbsps88rmamyqmpy0q-vm-test-run-pg_graphql.drv