Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: haddock (user goal)
rejecting: haddock-2.16.0, 2.15.0.2, 2.15.0.1, 2.15.0, 2.14.3, 2.14.2, 2.14.1,
2.13.2.1, 2.13.2, 2.13.1, 2.13.0, 2.12.0, 2.11.1, 2.11.0, 2.10.0, 2.9.4,
2.9.3, 2.9.2, 2.9.1, 2.9.0, 2.8.1, 2.8.0, 2.7.2, 2.7.1, 2.7.0, 2.6.1, 2.6.0,
2.5.0, 2.4.2, 2.4.1, 2.4.0, 2.2.2, 2.2.1, 2.2.0, 2.1.0, 2.0.0.0 (global
constraint requires ==0.9)
trying: haddock-0.9
trying: base-4.7.0.1/installed-e4b... (dependency of haddock-0.9)
rejecting: haddock-0.9:+small_base (conflict: base==4.7.0.1/installed-e4b...,
haddock-0.9:small_base => base>=2.1 && <4)
rejecting: haddock-0.9:-small_base (conflict: base==4.7.0.1/installed-e4b...,
haddock-0.9:small_base => base>=1.0 && <4)
Dependency tree exhaustively searched.