Resolving dependencies...
Downloading th-lift-0.4...
Warning: th-lift.cabal: A package using 'cabal-version: >=1.3' must use
section syntax. See the Cabal user guide for details.
Configuring th-lift-0.4...
Building th-lift-0.4...
Preprocessing library th-lift-0.4...
[1 of 1] Compiling Language.Haskell.TH.Lift ( Language/Haskell/TH/Lift.hs, dist/build/Language/Haskell/TH/Lift.o )

Language/Haskell/TH/Lift.hs:80:10:
    Illegal instance declaration for `Lift Rational'
      (All instance types must be of the form (T a1 ... an)
       where a1 ... an are *distinct type variables*,
       and each type variable appears at most once in the instance head.
       Use -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `Lift Rational'
Failed to install th-lift-0.4
cabal: Error: some packages failed to install:
th-lift-0.4 failed during the building phase. The exception was:
ExitFailure 1