Resolving dependencies...
Downloading monads-fd-0.0.0.1...
Configuring monads-fd-0.0.0.1...
Building monads-fd-0.0.0.1...
Preprocessing library monads-fd-0.0.0.1...

Control/Monad/Cont.hs:77:8:
    Could not find module `Control.Monad.Trans'
    It is a member of the hidden package `mtl-2.1.2'.
    Perhaps you need to add `mtl' to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
Failed to install monads-fd-0.0.0.1
Configuring packedstring-0.1.0.1...
Building packedstring-0.1.0.1...
Preprocessing library packedstring-0.1.0.1...
[1 of 1] Compiling Data.PackedString ( Data/PackedString.hs, dist/build/Data/PackedString.o )

Data/PackedString.hs:112:1:
    Illegal standalone deriving declaration
      Use -XStandaloneDeriving to enable this extension
Failed to install packedstring-0.1.0.1
cabal: Error: some packages failed to install:
fclabels-0.1.2 depends on packedstring-0.1.0.1 which failed to install.
monads-fd-0.0.0.1 failed during the building phase. The exception was:
ExitFailure 1
packedstring-0.1.0.1 failed during the building phase. The exception was:
ExitFailure 1
template-haskell-2.3.0.1 depends on packedstring-0.1.0.1 which failed to
install.