problem

It is awkward that there is no officially recognized name for files *.cabal that define a Cabal package. Some other languages call them «manifest». I too was inclined to call them so, for the lack of a better pick. But the word «manifest» is flat, boring, it names a phenomenon that is only short lived.

manifest
3 : a list of passengers or an invoice of cargo for a vehicle (such as a ship or plane)

— The Merriam-Webster dictionary.

solution

We have already taken the word «cabal». With a Cabal, one signs a Pact. It also has a fitting connotation of eternal commitment: if you specify version bounds thoroughly, your package will build now and forever, and if you put it to Hackage, you cannot take it back.

With the Haskell Cabal, one Signs a Pact in Blood.