Resolving dependencies... cabal: Could not resolve dependencies: next goal: stack-prism (user goal) rejecting: stack-prism-0.1.6, stack-prism-0.1.5, stack-prism-0.1.4 (constraint from user target requires ==0.1.3) trying: stack-prism-0.1.3 trying: base-4.9.0.0/installed-4.9... (dependency of stack-prism-0.1.3) next goal: template-haskell (dependency of stack-prism-0.1.3) rejecting: template-haskell-2.11.0.0/installed-2.1..., template-haskell-2.11.0.0 (conflict: stack-prism => template-haskell>=2.8 && <2.11) rejecting: template-haskell-2.10.0.0 (conflict: base==4.9.0.0/installed-4.9..., template-haskell => base==4.8.*) rejecting: template-haskell-2.9.0.0 (conflict: base==4.9.0.0/installed-4.9..., template-haskell => base==4.7.*) rejecting: template-haskell-2.8.0.0 (conflict: base==4.9.0.0/installed-4.9..., template-haskell => base==4.6.*) rejecting: template-haskell-2.7.0.0, template-haskell-2.6.0.0, template-haskell-2.5.0.0, 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: stack-prism => template-haskell>=2.8 && <2.11) Dependency tree exhaustively searched.