buildStackProject: Set __noChroot to make it fail without sandbox

Building such a derivation will result in

  error: derivation '/nix/store/nk4wms3hk4mp9lc86k30vc8w44fcq0rj-foo.drv' has '__noChroot' set, but that's not allowed when 'sandbox' is 'true'

when attempting to build it without --option sandbox false