Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: mu-graphql-0.5.0.4 (user goal) [__1] trying: template-haskell-2.18.0.0/installed-2.18.0.0 (dependency of mu-graphql) [__2] next goal: mu-rpc (dependency of mu-graphql) [__2] rejecting: mu-rpc-0.5.0.2 (conflict: template-haskell==2.18.0.0/installed-2.18.0.0, mu-rpc => template-haskell>=2.14 && <2.18) [__2] skipping: mu-rpc-0.5.0.1, mu-rpc-0.5.0.0, mu-rpc-0.4.0.1, mu-rpc-0.4.0.0 (has the same characteristics that caused the previous version to fail: excludes 'template-haskell' version 2.18.0.0) [__2] rejecting: mu-rpc-0.3.0.0 (conflict: mu-graphql => mu-rpc>=0.5 && <0.6) [__2] skipping: mu-rpc-0.2.0.0, mu-rpc-0.1.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.5 && <0.6' from 'mu-graphql') [__2] fail (backjumping, conflict set: mu-graphql, mu-rpc, template-haskell) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: mu-graphql, template-haskell, mu-rpc