Resolving dependencies... cabal: Could not resolve dependencies: next goal: hmatrix (user goal) rejecting: hmatrix-0.17.0.1, 0.16.1.5, 0.16.1.4, 0.16.1.3, 0.16.1.2, 0.16.1.1, 0.16.1.0, 0.16.0.6, 0.16.0.5, 0.16.0.4, 0.16.0.3, 0.16.0.2, 0.15.2.1, 0.15.2.0, 0.15.0.1, 0.15.0.0, 0.14.1.0, 0.14.0.1, 0.14.0.0, 0.13.1.0, 0.13.0.0, 0.12.0.2, 0.12.0.1, 0.12.0.0, 0.11.1.0, 0.11.0.4, 0.11.0.3, 0.11.0.1, 0.11.0.0, 0.10.0.2, 0.10.0.1, 0.10.0.0, 0.9.3.0, 0.8.3.1, 0.8.2.0, 0.8.1.1, 0.8.1.0, 0.8.0.0 (global constraint requires ==0.7.2.1) trying: hmatrix-0.7.2.1 trying: base-4.8.1.0/installed-4f7... (dependency of hmatrix-0.7.2.1) trying: process-1.2.3.0/installed-f02... (dependency of hmatrix-0.7.2.1) next goal: haskell98 (dependency of hmatrix-0.7.2.1) 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.*) rejecting: haskell98-2.0.0.1, 2.0.0.0 (conflict: process => directory==1.2.2.0/installed-258..., haskell98 => directory>=1.1 && <1.2) rejecting: haskell98-1.1.0.1, 1.1.0.0, 1.0.1.1 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base>=3 && <4.6) rejecting: haskell98-1.0.1.0 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base<4.6) rejecting: haskell98-1.0 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base<4.3) Dependency tree exhaustively searched.