Resolving dependencies... cabal: Could not resolve dependencies: next goal: Agda-executable (user goal) rejecting: Agda-executable-2.3.0.1, 2.3.0, 2.2.10, 2.2.8, 2.2.6, 2.2.4, 2.2.2 (global constraint requires ==2.2.0) trying: Agda-executable-2.2.0 trying: base-4.8.1.0/installed-4f7... (dependency of Agda-executable-2.2.0) next goal: Agda (dependency of Agda-executable-2.2.0) rejecting: Agda-2.4.2.4, 2.4.2.3, 2.4.2.2, 2.4.2.1, 2.4.2, 2.4.0.2, 2.4.0.1, 2.4.0, 2.3.2.2, 2.3.2.1, 2.3.2, 2.3.0.1, 2.3.0, 2.2.10, 2.2.8, 2.2.6, 2.2.4, 2.2.2 (conflict: Agda-executable => Agda==2.2.0) rejecting: Agda-2.2.0 (conflict: base==4.8.1.0/installed-4f7..., Agda => base>=3 && <4) Dependency tree exhaustively searched.