qbs-docs @2.2.1: Error: No files have been installed in the destroot directory!

[ryandesign (Ryan Carsten Schmidt)]

​https://build.macports.org/builders/ports-11_x86_64-builder/builds/138818/steps/install-port/logs/stdio

Error: No files have been installed in the destroot directory!

[jmroot (Joshua Root)]

-- Found Python3: /opt/local/bin/python3.12 (found version "3.12.1") found components: Interpreter 
-- Could NOT find PY_lxml (missing: PY_LXML) 
-- Could NOT find PY_bs4 (missing: PY_BS4) 
CMake Warning at cmake/QbsDocumentation.cmake:155 (message):
  Cannot import lxml and bs4 python modules.  Qbs documentation will not be
  built.

The dependencies declared are python311, py311-beautifulsoup4, py311-lxml. Looks like the configure arg intended to tell it which python to use isn't working.