ghc version 9.6.5 Fails to Build on macOS; Error ghc: can't find a package database

Summary

I'm the maintainer of ghc for MacPorts, and just updated to version 9.6.5. The documented ghc (hadrian-based) build commands that work on previous versions fail with the latest ghc version 9.6.5 Fails to Build on macOS, cabal version 3.10.3.0.

The consistent build failure across macOS versions and architectures is:

:info:build # cabal-configure (for _build/stage0/libraries/mtl/setup-config)
:info:build dieVerbatim: user error (Error: hadrian:
:info:build '/opt/local/var/macports/build/_opt_local_ports_lang_ghc/ghc/work/.home/.cabal/bin/ghc'
:info:build exited with an error:
:info:build ghc: can't find a package database at
:info:build _build/stage0/libraries/ghc-boot-th/build/package.conf.inplace
:info:build )

Reference: https://github.com/macports/macports-ports/pull/23548

Steps to reproduce

Build ghc using hadrian with these document steps: https://gitlab.haskell.org/ghc/ghc/-/wikis/building/hadrian

Implemented in the Portfile.

Expected behavior

Successful ghc build.

Environment

• GHC version used: 9.6.5 Optional:

• Operating System: macOS

• System Architecture: arm64, x86_64