Resolving dependencies...
[1 of 1] Compiling Main             ( /tmp/cabal-tmp-25317/dimensional-0.7/dist/setup/setup.hs, /tmp/cabal-tmp-25317/dimensional-0.7/dist/setup/Main.o )
Linking /tmp/cabal-tmp-25317/dimensional-0.7/dist/setup/setup ...
Configuring dimensional-0.7...
Warning: No 'build-type' specified. If you do not need a custom Setup.hs or
./configure script then use 'build-type: Simple'.
Building dimensional-0.7...
Preprocessing library dimensional-0.7...
[1 of 8] Compiling Numeric.NumType  ( Numeric/NumType.lhs, dist/build/Numeric/NumType.o )

Numeric/NumType.lhs:166:3:
    Too many parameters for class ‘Negate’
    (Use MultiParamTypeClasses to allow multi-parameter classes)
    In the class declaration for ‘Negate’
Failed to install dimensional-0.7
cabal: Error: some packages failed to install:
dimensional-0.7 failed during the building phase. The exception was:
ExitFailure 1