Resolving dependencies... cabal: Could not resolve dependencies: trying: repa-bytestring-3.0.0.1 (user goal) trying: base-4.7.0.1/installed-e4b... (dependency of repa-bytestring-3.0.0.1) next goal: repa (dependency of repa-bytestring-3.0.0.1) rejecting: repa-3.4.0.1, 3.3.1.2, 3.3.1.1, 3.2.5.1, 3.2.3.3, 3.2.3.2, 3.2.3.1, 3.2.2.201204.1, 3.2.2.3, 3.2.2.2, 3.2.2.1, 3.2.1.1, 3.1.4.2, 3.1.4.1, 3.1.3.3, 3.1.3.2, 3.1.3.1, 3.1.2.1, 3.1.1.1, 3.1.0.1 (conflict: repa-bytestring => repa==3.0.*) rejecting: repa-3.0.0.1 (conflict: base==4.7.0.1/installed-e4b..., repa => base==4.5.*) rejecting: repa-2.2.0.1, 2.1.1.6, 2.1.1.5, 2.1.1.4, 2.1.1.3, 2.1.1.2, 2.1.1.1, 2.1.0.1, 2.0.2.1, 2.0.1.1, 2.0.0.4, 2.0.0.3, 2.0.0.2, 2.0.0.1, 1.1.0.0, 1.0.0.0 (conflict: repa-bytestring => repa==3.0.*) Dependency tree exhaustively searched.