Resolving dependencies...
Downloading pesca-4...
Configuring pesca-4...
Building pesca-4...
Preprocessing executable 'pesca' for pesca-4...

src/Natural.hs:5:8:
    Could not find module `PrSequent'
    Use -v to see a list of the files searched for.
Failed to install pesca-4
cabal: Error: some packages failed to install:
pesca-4 failed during the building phase. The exception was:
ExitFailure 1