--- CMakeLists.txt.orig	2026-06-09 06:48:58 UTC
+++ CMakeLists.txt
@@ -51,17 +51,14 @@ message(STATUS "gau2grid install: ${CMAKE_INSTALL_PREF
 message(STATUS "gau2grid install: ${CMAKE_INSTALL_PREFIX}")
 
 #  <<  Python  >>
-find_package(Python 3.6 REQUIRED COMPONENTS Interpreter)
+find_package(Python ${FREEBSD_PYTHON_VER} REQUIRED COMPONENTS Interpreter)
 message(STATUS "${Cyan}Found Python ${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}${ColourReset}: ${Python_EXECUTABLE} (found version ${Python_VERSION})")
 
 
 ################################  Main Project  ################################
 add_custom_command(
     OUTPUT  gau2grid/gau2grid.h gau2grid_orbital.c gau2grid_phi.c gau2grid_deriv1.c gau2grid_deriv2.c gau2grid_deriv3.c gau2grid_transform.c gau2grid_helper.c
-    COMMAND Python::Interpreter -c "import sys; \
-                                     sys.path.append('${PROJECT_SOURCE_DIR}'); \
-                                     import gau2grid as gg; \
-                                     gg.c_gen.generate_c_gau2grid(${MAX_AM}, path='${CMAKE_CURRENT_BINARY_DIR}')"
+    COMMAND Python::Interpreter -c "import sys;                                      sys.path.append('${PROJECT_SOURCE_DIR}');                                      import gau2grid as gg;                                      gg.c_gen.generate_c_gau2grid(${MAX_AM}, path='${CMAKE_CURRENT_BINARY_DIR}')"
     DEPENDS gau2grid/c_generator.py
             gau2grid/c_generator.py
             gau2grid/codegen.py
@@ -117,6 +114,7 @@ target_include_directories(gg PUBLIC
                            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 
 # GNUInstallDirs "DATADIR" wrong here; CMake search path wants "share".
+if (FALSE) # see https://github.com/dgasmith/gau2grid/issues/39#issuecomment-457856365
 set(CMAKECONFIG_INSTALL_DIR "share/cmake/${PN}")
 configure_package_config_file(cmake/${PN}Config.cmake.in
                               "${CMAKE_CURRENT_BINARY_DIR}/${PN}Config.cmake"
@@ -148,6 +146,7 @@ endif()
            NAMESPACE "${PN}::"
            FILE "${PROJECT_BINARY_DIR}/${PN}Targets.cmake")
 endif()
+endif()
 
 if(${INSTALL_PYMOD})
     if(${NATIVE_PYTHON_INSTALL})
@@ -171,14 +170,14 @@ if(${INSTALL_PYMOD})
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
 
     install(DIRECTORY gau2grid
-            DESTINATION ${CMAKE_INSTALL_LIBDIR}${PYMOD_INSTALL_LIBDIR}
+            DESTINATION ${PYMOD_INSTALL_LIBDIR}
             USE_SOURCE_PERMISSIONS
             FILES_MATCHING PATTERN "*.py")
 
     install(FILES $<TARGET_FILE:gg>
-            DESTINATION ${CMAKE_INSTALL_LIBDIR}${PYMOD_INSTALL_LIBDIR}/gau2grid
+            DESTINATION ${PYMOD_INSTALL_LIBDIR}/gau2grid
             RENAME "gg${PYLIB_EXTENSION}")
 
     install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE
-            DESTINATION ${CMAKE_INSTALL_LIBDIR}${PYMOD_INSTALL_LIBDIR}/gau2grid)
+            DESTINATION ${PYMOD_INSTALL_LIBDIR}/gau2grid)
 endif()