fix compile error

[ 75 of 178] Compiling Stats            ( src/Stats.hs, dist/build/Stats.o )

src/Stats.hs:122:54: Warning:
    ‘StatT’ is an instance of Monad but not Applicative - this will become an error in GHC 7.10, under the Applicative-Monad Proposal.

src/Stats.hs:132:10: Warning:
    ‘StatM’ is an instance of Monad but not Applicative - this will become an error in GHC 7.10, under the Applicative-Monad Proposal.
[ 76 of 178] Compiling Fixer.VMap       ( src/Fixer/VMap.hs, dist/build/Fixer/VMap.o )

src/Fixer/VMap.hs:29:28:
    Ambiguous occurrence ‘Proxy’
    It could refer to either ‘Fixer.VMap.Proxy’,
                             defined at src/Fixer/VMap.hs:33:1
                          or ‘Data.Typeable.Proxy’,
                             imported from ‘Data.Typeable’ at src/Fixer/VMap.hs:16:1-20
                             (and originally defined in ‘Data.Proxy’)

src/Fixer/VMap.hs:36:26:
    Ambiguous occurrence ‘Proxy’
    It could refer to either ‘Fixer.VMap.Proxy’,
                             defined at src/Fixer/VMap.hs:33:1
                          or ‘Data.Typeable.Proxy’,
                             imported from ‘Data.Typeable’ at src/Fixer/VMap.hs:16:1-20
                             (and originally defined in ‘Data.Proxy’)

src/Fixer/VMap.hs:37:18:
    Ambiguous occurrence ‘Proxy’
    It could refer to either ‘Fixer.VMap.Proxy’,
                             defined at src/Fixer/VMap.hs:33:16
                          or ‘Data.Typeable.Proxy’,
                             imported from ‘Data.Typeable’ at src/Fixer/VMap.hs:16:1-20
                             (and originally defined in ‘Data.Proxy’)

src/Fixer/VMap.hs:64:51:
    Ambiguous occurrence ‘Proxy’
    It could refer to either ‘Fixer.VMap.Proxy’,
                             defined at src/Fixer/VMap.hs:33:16
                          or ‘Data.Typeable.Proxy’,
                             imported from ‘Data.Typeable’ at src/Fixer/VMap.hs:16:1-20
                             (and originally defined in ‘Data.Proxy’)
make[1]: *** [cabal-build] Error 1
make: *** [all] Error 2