Can't import reflex with hsnippet

[qrilka]

I was trying out basic example from https://github.com/reflex-frp/reflex-platform#a-number-input but can't get it working - hsnippet.com says "Build failed". I was trying to import Reflex or Reflex.Dom (I see reflex and reflex-dom packages in "Packages" tab) but hsnippet fails for find them. The same situation with Safe module :-\