these 2 derivations will be built:
  /nix/store/q8iamv4nskkvqzcdbyjx1b4x5wlk3y5j-nixos-test-driver-pg_graphql.drv
  /nix/store/xvz26qk91bmaiy9ripvz0lrfyi5lk21n-vm-test-run-pg_graphql.drv