Resolving dependencies... cabal: Could not resolve dependencies: next goal: husk-scheme (user goal) rejecting: husk-scheme-3.19.1, 3.19, 3.18, 3.17.1, 3.17, 3.16.1, 3.16, 3.15.2, 3.15.1, 3.15, 3.14, 3.13, 3.12, 3.11, 3.10, 3.9, 3.8, 3.7, 3.6.3, 3.6.2, 3.6.1, 3.6, 3.5.7, 3.5.6, 3.5.5, 3.5.4, 3.5.3.2, 3.5.3.1, 3.5.3, 3.5.2.3, 3.5.2.2, 3.5.2.1 (global constraint requires ==3.5.2) trying: husk-scheme-3.5.2 trying: base-4.8.1.0/installed-4f7... (dependency of husk-scheme-3.5.2) next goal: haskell98 (dependency of husk-scheme-3.5.2) rejecting: haskell98-2.0.0.3 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base>=4.7 && <4.8) rejecting: haskell98-2.0.0.2 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base==4.6.*) trying: haskell98-2.0.0.1 trying: filepath-1.4.0.0/installed-8fe... (dependency of husk-scheme-3.5.2) next goal: process (dependency of husk-scheme-3.5.2) rejecting: process-1.2.3.0/installed-f02..., 1.3.0.0, 1.2.3.0, 1.2.2.0, 1.2.1.0, 1.2.0.0 (conflict: haskell98 => process>=1.0 && <1.2) rejecting: process-1.1.0.2, 1.1.0.1 (conflict: filepath==1.4.0.0/installed-8fe..., process => filepath>=1.1 && <1.4) rejecting: process-1.1.0.0, 1.0.1.5, 1.0.1.4, 1.0.1.3 (conflict: filepath==1.4.0.0/installed-8fe..., process => filepath>=1.1 && <1.3) rejecting: process-1.0.1.2, 1.0.1.1 (conflict: filepath==1.4.0.0/installed-8fe..., process => filepath>=1.1 && <1.2) rejecting: process-1.0.0.0 (conflict: base==4.8.1.0/installed-4f7..., process => base<4.3) Dependency tree exhaustively searched.