Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: fpco-api (user goal)
rejecting: fpco-api-1.2.0.5, 1.2.0.4, 1.2.0.3, 1.2.0.2, 1.2.0.1, 1.2.0,
1.1.1.4, 1.1.1.3, 1.1.1.2, 1.1.1.1, 1.1.1, 1.1.0, 1.0.5, 1.0.4, 1.0.3, 1.0.2,
1.0.1 (global constraint requires ==1.0.0)
trying: fpco-api-1.0.0
next goal: base (dependency of fpco-api-1.0.0)
rejecting: base-4.8.1.0/installed-4f7... (conflict: base =>
ghc-prim==0.4.0.0/installed-af1..., fpco-api => ghc-prim==0.2.*)
rejecting: base-4.8.1.0, 4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0,
4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1,
4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires
installed instance)
Dependency tree exhaustively searched.