Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hsignal (user goal)
rejecting: hsignal-0.2.7.1, 0.2.7, 0.2.6.1, 0.2.6, 0.2.5, 0.2.4.3, 0.2.4.2,
0.2.4.1, 0.2.4, 0.2.3.3, 0.2.3.1, 0.2.3, 0.2.2.1, 0.2.2, 0.2.1.0, 0.1.3.6,
0.1.3.5, 0.1.3.4, 0.1.3.3, 0.1.3.2, 0.1.3, 0.1.2.5, 0.1.2.4, 0.1.2.3, 0.1.2.2,
0.1.2.1, 0.1.1.1 (global constraint requires ==0.1.0.5)
trying: hsignal-0.1.0.5
next goal: ghc-binary (dependency of hsignal-0.1.0.5)
Dependency tree exhaustively searched.