Resolving dependencies...
cabal: Could not resolve dependencies:
trying: hslinks-0.6.1 (user goal)
trying: regex-compat-0.95.1 (dependency of hslinks-0.6.1)
trying: regex-base-0.93.2 (dependency of regex-compat-0.95.1)
trying: mtl-2.2.1 (dependency of regex-base-0.93.2)
next goal: transformers (dependency of mtl-2.2.1)
rejecting: transformers-0.3.0.0/installed-16a... (conflict: mtl =>
transformers==0.4.*)
trying: transformers-0.4.3.0
trying: hint-0.4.2.2 (dependency of hslinks-0.6.1)
next goal: ghc (dependency of hint-0.4.2.2)
rejecting: ghc-7.8.3/installed-4df... (conflict: transformers==0.4.3.0, ghc =>
transformers==0.3.0.0/installed-16a...)
Backjump limit reached (change with --max-backjumps).