Patch copied from the gentoo overlay and forwardported from 2.79b to 3.5.1.
----
diff -urp blender-3.5.1.orig/source/creator/CMakeLists.txt blender-3.5.1/source/creator/CMakeLists.txt
--- blender-3.5.1.orig/source/creator/CMakeLists.txt	2023-04-05 00:48:14.000000000 -0700
+++ blender-3.5.1/source/creator/CMakeLists.txt	2023-04-28 12:38:30.917667449 -0700
@@ -387,12 +387,6 @@ endif()
 # Install Targets (Generic, All Platforms)
 
 
-# Important to make a clean install each time, else old scripts get loaded.
-install(
-  CODE
-  "file(REMOVE_RECURSE ${TARGETDIR_VER})"
-)
-
 if(WITH_PYTHON)
   # install(CODE "message(\"copying blender scripts...\")")