Resolving dependencies... cabal: Could not resolve dependencies: trying: ihaskell-inline-r-0.1.0.0 (user goal) trying: temporary-1.2.0.3 (dependency of ihaskell-inline-r-0.1.0.0) next goal: transformers (dependency of temporary-1.2.0.3) rejecting: transformers-0.3.0.0/installed-16a... (conflict: mtl => transformers==0.4.*) trying: transformers-0.4.3.0 trying: ihaskell-0.7.1.0 (dependency of ihaskell-inline-r-0.1.0.0) next goal: ghc (dependency of ihaskell-0.7.1.0) rejecting: ghc-7.8.3/installed-0af... (conflict: transformers==0.4.3.0, ghc => transformers==0.3.0.0/installed-16a...) Backjump limit reached (change with --max-backjumps).