Resolving dependencies...
Configuring judy-0.1...
Building judy-0.1...
Preprocessing library judy-0.1...

on the commandline: Warning:
    The -fvia-C flag does nothing; it will be removed in a future GHC release
[1 of 1] Compiling Data.Judy        ( dist/build/Data/Judy.hs, dist/build/Data/Judy.o )

Data/Judy.hsc:79:1:
    Failed to load interface for ‘GHC.Prim’
    It is a member of the hidden package ‘ghc-prim-0.4.0.0’.
    Perhaps you need to add ‘ghc-prim’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
Failed to install judy-0.1
cabal: Error: some packages failed to install:
judy-0.1 failed during the building phase. The exception was:
ExitFailure 1