these 2 derivations will be built:
  /nix/store/mvrbywn627qmziwlww8zhwq108xxzjk9-nixos-test-driver-hypopg.drv
  /nix/store/b6n1sdcfk1lkahcnqrdbvyi6kh9x2xwj-vm-test-run-hypopg.drv