nixpkgs/pkgs/development/python-modules/ifcopenshell/site-packages.patch

--- a/src/ifcwrap/CMakeLists.txt
+++ b/src/ifcwrap/CMakeLists.txt
@@ -68,26 +68,17 @@ endif()
 # directory in which the wrapper can be installed.
 FIND_PACKAGE(PythonInterp)
 IF(PYTHONINTERP_FOUND AND NOT "${PYTHON_EXECUTABLE}" STREQUAL "")
-    EXECUTE_PROCESS(
-        COMMAND ${PYTHON_EXECUTABLE} -c "import sys; from distutils.sysconfig import get_python_lib; sys.stdout.write(get_python_lib(1))"
-        OUTPUT_VARIABLE python_package_dir
-    )
-
-    IF("${python_package_dir}" STREQUAL "")
-        MESSAGE(WARNING "Unable to locate Python site-package directory, unable to install the Python wrapper")
-    ELSE()
         FILE(GLOB_RECURSE sourcefiles "${CMAKE_CURRENT_SOURCE_DIR}/../ifcopenshell-python/ifcopenshell/*.py")
         FOREACH(file ${sourcefiles})
             FILE(RELATIVE_PATH relative "${CMAKE_CURRENT_SOURCE_DIR}/../ifcopenshell-python/ifcopenshell/" "${file}")
             GET_FILENAME_COMPONENT(dir "${relative}" DIRECTORY)
 			INSTALL(FILES "${file}"
-                    DESTINATION "${python_package_dir}/ifcopenshell/${dir}")
+                    DESTINATION "@site_packages@/ifcopenshell/${dir}")
         ENDFOREACH()
         INSTALL(FILES "${CMAKE_BINARY_DIR}/ifcwrap/ifcopenshell_wrapper.py"
-                DESTINATION "${python_package_dir}/ifcopenshell")
+                DESTINATION "@site_packages@/ifcopenshell")
         INSTALL(TARGETS _ifcopenshell_wrapper
-                DESTINATION "${python_package_dir}/ifcopenshell")
-    ENDIF()
+                DESTINATION "@site_packages@/ifcopenshell")
 ELSE()
     MESSAGE(WARNING "No Python interpreter found, unable to install the Python wrapper")
 ENDIF()