diff --git a/prepare.py b/prepare.py
index 7488ada15..6f5c31086 100755
--- a/prepare.py
+++ b/prepare.py
@@ -131,6 +131,8 @@ class DesktopPreparator(prepare.Preparator):
                 graphviz_prog = 'graphviz'
             ret |= not self.check_is_installed('doxygen', doxygen_prog)
             ret |= not self.check_is_installed('dot', graphviz_prog)
+            ret |= not self.check_python_module_is_present('pystache')
+            ret |= not self.check_python_module_is_present('wheel')
         return ret
 
     def show_missing_dependencies(self):
@@ -198,6 +200,7 @@ def main():
     preparator.parse_args()
     if preparator.check_tools() != 0:
         preparator.show_missing_dependencies()
+        preparator.show_missing_python_dependencies()
         return 1
     return preparator.run()
 
diff --git a/submodules/cmake-builder b/submodules/cmake-builder
index 08520b0cc..052449d1f 160000
--- a/submodules/cmake-builder
+++ b/submodules/cmake-builder
@@ -1 +1 @@
-Subproject commit 08520b0ccb2628de41dde919b191415cac554f1d
+Subproject commit 052449d1f2e52994ff88a8dcd7d13fa8981f6a00