--- a/media-gfx/blender/blender-2.83.4-r1.ebuild	
+++ a/media-gfx/blender/blender-2.83.4-r1.ebuild	
@@ -238,7 +238,10 @@ src_compile() {
 
 		cd "${CMAKE_USE_DIR}" || die
 		einfo "Generating (BPY) Blender Python API docs ..."
-		"${BUILD_DIR}"/bin/blender --background --python doc/python_api/sphinx_doc_gen.py -noaudio || die "sphinx failed."
+		"${BUILD_DIR}"/bin/blender --background -noaudio                     \
+		                           --env-system-scripts release/scripts      \
+		                           --python doc/python_api/sphinx_doc_gen.py \
+		|| die "blender failed."
 
 		cd "${CMAKE_USE_DIR}"/doc/python_api || die
 		sphinx-build sphinx-in BPY_API || die "sphinx failed."