Resolving dependencies... cabal: Could not resolve dependencies: next goal: hsc3-server (user goal) rejecting: hsc3-server-0.10.0, 0.9.2, 0.9.1, 0.8.0, 0.7.0, 0.6.0, 0.5.0, 0.4.0, 0.3.2, 0.3.1, 0.3.0 (global constraint requires ==0.1.0) trying: hsc3-server-0.1.0 trying: base-4.8.1.0/installed-4f7... (dependency of hsc3-server-0.1.0) next goal: strict-concurrency (dependency of hsc3-server-0.1.0) rejecting: strict-concurrency-0.2.4.1, 0.2.4 (conflict: base==4.8.1.0/installed-4f7..., strict-concurrency => base>=4 && <4.6) rejecting: strict-concurrency-0.2.3 (conflict: base==4.8.1.0/installed-4f7..., strict-concurrency => base>=3 && <4.3) rejecting: strict-concurrency-0.2.2, 0.2.1 (conflict: base==4.8.1.0/installed-4f7..., strict-concurrency => base>=3 && <4) rejecting: strict-concurrency-0.2, 0.1 (conflict: base==4.8.1.0/installed-4f7..., strict-concurrency => base<4.3) Dependency tree exhaustively searched.