Resolving dependencies... cabal: Could not resolve dependencies: next goal: http-proxy (user goal) rejecting: http-proxy-0.0.12, 0.0.11, 0.0.10, 0.0.9 (global constraint requires ==0.0.8) trying: http-proxy-0.0.8 trying: base-4.8.1.0/installed-4f7... (dependency of http-proxy-0.0.8) next goal: lifted-base (dependency of http-proxy-0.0.8) rejecting: lifted-base-0.2.3.6, 0.2.3.5, 0.2.3.4, 0.2.3.3, 0.2.3.2, 0.2.3.1, 0.2.3.0, 0.2.2.2, 0.2.2.1, 0.2.2.0, 0.2.1.2, 0.2.1.1, 0.2.1.0, 0.2.0.5, 0.2.0.4, 0.2.0.3, 0.2.0.2, 0.2.0.1, 0.2 (conflict: http-proxy => lifted-base>=0.1 && <0.2) rejecting: lifted-base-0.1.2, 0.1.1.1 (conflict: base==4.8.1.0/installed-4f7..., lifted-base => base>=3 && <4.7) rejecting: lifted-base-0.1.1, 0.1.0.4, 0.1.0.3, 0.1.0.2 (conflict: base==4.8.1.0/installed-4f7..., lifted-base => base>=3 && <4.6) rejecting: lifted-base-0.1.0.1, 0.1 (conflict: base==4.8.1.0/installed-4f7..., lifted-base => base>=3 && <4.5) Dependency tree exhaustively searched.