diff --git a/addons/FastJet/CMakeLists.txt b/addons/FastJet/CMakeLists.txt
index d8536f0277..355201922c 100644
--- a/addons/FastJet/CMakeLists.txt
+++ b/addons/FastJet/CMakeLists.txt
@@ -18,3 +18,6 @@ install(FILES
    ${CMAKE_CURRENT_LIST_DIR}/JetClustering.h
    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/FastJet
    )
+
+file(GLOB _addon_python_files python/*.py)
+install(FILES ${_addon_python_files} DESTINATION ${CMAKE_INSTALL_PREFIX}/python/addons/FastJet)
diff --git a/addons/ONNXRuntime/CMakeLists.txt b/addons/ONNXRuntime/CMakeLists.txt
index 12cf7961e7..c420ee0bde 100644
--- a/addons/ONNXRuntime/CMakeLists.txt
+++ b/addons/ONNXRuntime/CMakeLists.txt
@@ -42,3 +42,6 @@ if(BUILD_TESTING)
   # add all integration tests
   add_integration_test("examples/FCCee/weaver/analysis_inference.py")
 endif()
+
+file(GLOB _addon_python_files python/*.py)
+install(FILES ${_addon_python_files} DESTINATION ${CMAKE_INSTALL_PREFIX}/python/addons/ONNXRuntime)