Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: copilot-language (user goal)
rejecting: copilot-language-2.1.2, 2.1.1, 0.9.1, 0.9, 0.8 (global constraint
requires ==0.7)
trying: copilot-language-0.7
next goal: base (dependency of copilot-language-0.7)
rejecting: base-4.7.0.1/installed-e4b... (conflict: base =>
ghc-prim==0.3.1.0/installed-954..., copilot-language => ghc-prim>=0.2 && <0.3)
rejecting: base-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.