Resolving dependencies...
Downloading mage-1.1.0...
Configuring mage-1.1.0...
Building mage-1.1.0...
Preprocessing executable 'mage' for mage-1.1.0...

on the commandline: Warning:
    The -fvia-c flag does nothing; it will be removed in a future GHC release
[ 1 of 30] Compiling Util.Text        ( src/Util/Text.hs, dist/build/mage/mage-tmp/Util/Text.o )
[ 2 of 30] Compiling Keys             ( src/Keys.hs, dist/build/mage/mage-tmp/Keys.o )
[ 3 of 30] Compiling Util.PQueue      ( src/Util/PQueue.hs, dist/build/mage/mage-tmp/Util/PQueue.o )
[ 4 of 30] Compiling BoxChar          ( src/BoxChar.hs, dist/build/mage/mage-tmp/BoxChar.o )
[ 5 of 30] Compiling Util.Search      ( src/Util/Search.hs, dist/build/mage/mage-tmp/Util/Search.o )

src/Util/Search.hs:5:1: Warning:
    The import of `Data.List' is redundant
      except perhaps to import instances from `Data.List'
    To import instances alone, use: import Data.List()
[ 6 of 30] Compiling BodyParts        ( src/BodyParts.hs, dist/build/mage/mage-tmp/BodyParts.o )
[ 7 of 30] Compiling Body             ( src/Body.hs, dist/build/mage/mage-tmp/Body.o )
[ 8 of 30] Compiling Util.Grid        ( src/Util/Grid.hs, dist/build/mage/mage-tmp/Util/Grid.o )
[ 9 of 30] Compiling Util             ( src/Util.hs, dist/build/mage/mage-tmp/Util.o )
[10 of 30] Compiling RandT            ( src/RandT.hs, dist/build/mage/mage-tmp/RandT.o )

src/RandT.hs:27:30:
    Could not deduce (Functor m) arising from a use of `fmap'
    from the context (Monad m)
      bound by the instance declaration at src/RandT.hs:26:10-39
    Possible fix:
      add (Functor m) to the context of
        the type signature for fmap :: (a -> b) -> RandT m a -> RandT m b
        or the instance declaration
    In the second argument of `($)', namely `fmap f m'
    In the expression: RandT $ fmap f m
    In an equation for `fmap': fmap f (RandT m) = RandT $ fmap f m
Failed to install mage-1.1.0
cabal: Error: some packages failed to install:
mage-1.1.0 failed during the building phase. The exception was:
ExitFailure 1