Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hsignal (user goal)
rejecting: hsignal-0.2.7.5, hsignal-0.2.7.4, hsignal-0.2.7.2, hsignal-0.2.7.1,
hsignal-0.2.7, hsignal-0.2.6.1, hsignal-0.2.6, hsignal-0.2.5, hsignal-0.2.4.3,
hsignal-0.2.4.2, hsignal-0.2.4.1, hsignal-0.2.4, hsignal-0.2.3.3,
hsignal-0.2.3.1, hsignal-0.2.3, hsignal-0.2.2.1, hsignal-0.2.2,
hsignal-0.2.1.0, hsignal-0.1.3.6, hsignal-0.1.3.5, hsignal-0.1.3.4,
hsignal-0.1.3.3, hsignal-0.1.3.2, hsignal-0.1.3, hsignal-0.1.2.5,
hsignal-0.1.2.4, hsignal-0.1.2.3, hsignal-0.1.2.2, hsignal-0.1.2.1,
hsignal-0.1.1.1 (constraint from user target 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.