--- CMakeLists.txt.orig	2021-08-03 13:38:33 UTC
+++ CMakeLists.txt
@@ -123,7 +123,7 @@ if(${heyoka_VERSION} VERSION_LESS ${_HEYOKA_PY_MIN_HEY
 endif()
 
 # Python.
-find_package(Python3 REQUIRED COMPONENTS Interpreter Development)
+find_package(Python3 ${FREEBSD_PYTHON_DISTVERSION} REQUIRED EXACT COMPONENTS Interpreter Development)
 message(STATUS "Python3 interpreter: ${Python3_EXECUTABLE}")
 message(STATUS "Python3 installation directory: ${Python3_SITEARCH}")
 set(HEYOKA_PY_INSTALL_PATH "" CACHE STRING "heyoka module installation path")