Resolving dependencies... cabal: Could not resolve dependencies: next goal: repa-examples (user goal) rejecting: repa-examples-3.4.1.1, repa-examples-3.4.0.1, repa-examples-3.3.1.1, repa-examples-3.2.5.1, repa-examples-3.2.3.2, repa-examples-3.2.3.1, repa-examples-3.2.2.201204.1, repa-examples-3.2.2.3, repa-examples-3.2.2.1, repa-examples-3.2.1.1, repa-examples-3.1.3.1, repa-examples-3.1.0.1, repa-examples-3.0.0.2, repa-examples-3.0.0.1, repa-examples-2.2.0.1, repa-examples-2.1.0.2, repa-examples-2.1.0.1 (constraint from user target requires ==2.0.2.1) trying: repa-examples-2.0.2.1 trying: base-4.9.0.0/installed-4.9... (dependency of repa-examples-2.0.2.1) next goal: template-haskell (dependency of repa-examples-2.0.2.1) rejecting: template-haskell-2.11.0.0/installed-2.1..., template-haskell-2.11.0.0, template-haskell-2.10.0.0, template-haskell-2.9.0.0, template-haskell-2.8.0.0, template-haskell-2.7.0.0, template-haskell-2.6.0.0 (conflict: repa-examples => template-haskell>=2.5 && <2.6) rejecting: template-haskell-2.5.0.0 (conflict: base==4.9.0.0/installed-4.9..., template-haskell => base==4.3.*) rejecting: template-haskell-2.4.0.1, template-haskell-2.4.0.0, template-haskell-2.3.0.1, template-haskell-2.3.0.0, template-haskell-2.2.0.0 (conflict: repa-examples => template-haskell>=2.5 && <2.6) Dependency tree exhaustively searched.