diff --git a/.gitignore b/.gitignore
index d2bd1744b..57e16863b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,5 @@ Classes/LinphoneIOSVersion.h
 Pods/
 build
 test-reports
+WORK
+Makefile
diff --git a/prepare.py b/prepare.py
index 45af70408..cfa091b60 100755
--- a/prepare.py
+++ b/prepare.py
@@ -27,6 +27,7 @@ import os
 import re
 import shutil
 import sys
+sys.dont_write_bytecode = True
 sys.path.insert(0, 'submodules/cmake-builder')
 import prepare
 
diff --git a/submodules/cmake-builder b/submodules/cmake-builder
index 047fa5e04..06b57cba3 160000
--- a/submodules/cmake-builder
+++ b/submodules/cmake-builder
@@ -1 +1 @@
-Subproject commit 047fa5e04c85c855b0afdabcca929bd35a261065
+Subproject commit 06b57cba316a864eae695974d6b06624bf8df6c2