Resolving dependencies... cabal: Could not resolve dependencies: next goal: HaskellNet-SSL (user goal) rejecting: HaskellNet-SSL-0.3.3.0, HaskellNet-SSL-0.3.2.1, HaskellNet-SSL-0.3.2.0, HaskellNet-SSL-0.3.1.0, HaskellNet-SSL-0.3.0.0, HaskellNet-SSL-0.2.5.2, HaskellNet-SSL-0.2.5.1, HaskellNet-SSL-0.2.5, HaskellNet-SSL-0.2.4, HaskellNet-SSL-0.2.3, HaskellNet-SSL-0.2.2, HaskellNet-SSL-0.2.1, HaskellNet-SSL-0.2, HaskellNet-SSL-0.1.1.1, HaskellNet-SSL-0.1.1.0 (constraint from user target requires ==0.1.0.0) trying: HaskellNet-SSL-0.1.0.0 next goal: base (dependency of HaskellNet-SSL-0.1.0.0) rejecting: base-4.9.0.0/installed-4.9... (conflict: HaskellNet-SSL => base==4.5.*) 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.