Description: Disable build isolation to not download setuptools dependency.
Author: Bas Couwenberg <sebastic@debian.org>
Forwarded: https://github.com/MapServer/MapServer/pull/7377

--- a/src/mapscript/python/CMakeLists.txt
+++ b/src/mapscript/python/CMakeLists.txt
@@ -140,7 +140,7 @@ install(
     endif()
 
     execute_process(
-      COMMAND ${Python_EXECUTABLE} -m pip install \${PYTHON_ROOT} \${PYTHON_PREFIX} .
+      COMMAND ${Python_EXECUTABLE} -m pip install --no-build-isolation \${PYTHON_ROOT} \${PYTHON_PREFIX} .
       WORKING_DIRECTORY ${MAPSCRIPT_WORKING_DIR}
     )
   "