these 2 derivations will be built:
  /nix/store/ksf1ql0i03bpfgrqzcqmn54hbf42z9f3-nixos-test-driver-pg_graphql.drv
  /nix/store/5s47jgpmwkz04knmv0hwjhwymp8l5z1z-vm-test-run-pg_graphql.drv