Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: copilot-language (user goal)
rejecting: copilot-language-2.2.0, copilot-language-2.1.2,
copilot-language-2.1.1, copilot-language-0.9.1, copilot-language-0.9,
copilot-language-0.8, copilot-language-0.7, copilot-language-0.6 (constraint
from user target requires ==0.5)
trying: copilot-language-0.5
next goal: base (dependency of copilot-language-0.5)
rejecting: base-4.9.0.0/installed-4.9... (conflict: base =>
ghc-prim==0.5.0.0/installed-0.5..., copilot-language => ghc-prim>=0.2 && <0.3)
rejecting: base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
Dependency tree exhaustively searched.