Resolving dependencies...
cabal: Could not resolve dependencies:
trying: reflex-dom-colonnade-0.4.6 (user goal)
trying: base-4.9.0.0/installed-4.9... (dependency of
reflex-dom-colonnade-0.4.6)
next goal: reflex-dom (dependency of reflex-dom-colonnade-0.4.6)
rejecting: reflex-dom-0.3, reflex-dom-0.2, reflex-dom-0.1.1, reflex-dom-0.1
(conflict: base==4.9.0.0/installed-4.9..., reflex-dom => base>=4.7 && <4.9)
Dependency tree exhaustively searched.