[Haskell-cafe] Cabal v misses changes to cxx-files: files?

Using Cabal v3.2.0.0 and with the following stanza in my *.cabal file: executable ex9 import: shared-properties main-is: src/ex/ex9.hs cxx-sources: src/ex/ex9.cpp {snip} if I edit the file: `src/ex/ex9.cpp`, and then execute: `cabal build`, I'm told: $ cabal build Up to date Is this a known issue? Is there a workaround? Thanks, -db