these 2 derivations will be built:
  /nix/store/zi87wz1ry2fgcjvlgcxa7vl6lrdv07bz-nixos-test-driver-pg_graphql.drv
  /nix/store/2yy7x6ra42v7mb87as8rsh916f1xvd1z-vm-test-run-pg_graphql.drv