Resolving dependencies...
Downloading BNFC-2.6.0.0...
Configuring BNFC-2.6.0.0...
Building BNFC-2.6.0.0...
Preprocessing library BNFC-2.6.0.0...

runtime/Parsing/Chart.hs:15:8:
    Could not find module `Data.Matrix.Class'
    Use -v to see a list of the files searched for.
Failed to install BNFC-2.6.0.0
cabal: Error: some packages failed to install:
BNFC-2.6.0.0 failed during the building phase. The exception was:
ExitFailure 1