Resolving dependencies... cabal: Could not resolve dependencies: next goal: hmatrix (user goal) rejecting: hmatrix-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 (global constraint requires ==0.8.1.0) trying: hmatrix-0.8.1.0 trying: base-4.7.0.1/installed-e4b... (dependency of hmatrix-0.8.1.0) next goal: haskell98 (dependency of hmatrix-0.8.1.0) rejecting: haskell98-2.0.0.3/installed-85b..., 2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0.0.0, 1.1.0.1, 1.1.0.0, 1.0.1.1 (conflict: hmatrix => haskell98<1.0.1.1) rejecting: haskell98-1.0.1.0 (conflict: base==4.7.0.1/installed-e4b..., haskell98 => base<4.6) rejecting: haskell98-1.0 (conflict: base==4.7.0.1/installed-e4b..., haskell98 => base<4.3) Dependency tree exhaustively searched.