Resolving dependencies...
Downloading haskell-src-exts-0.3.3...
Configuring haskell-src-exts-0.3.3...
Building haskell-src-exts-0.3.3...
Preprocessing library haskell-src-exts-0.3.3...
shift/reduce conflicts:  5

Language/Haskell/Exts/Syntax.hs:1:16: Warning:
    -fglasgow-exts is deprecated: Use individual extensions instead

Language/Haskell/Exts/Syntax.hs:101:8:
    Could not find module `Data.Generics.Instances'
    Use -v to see a list of the files searched for.
Failed to install haskell-src-exts-0.3.3
cabal: Error: some packages failed to install:
haskell-src-exts-0.3.3 failed during the building phase. The exception was:
ExitFailure 1