-os.path.walk('../../samples', onSubmakefile, None)
-os.path.walk('../../contrib/build', onSubmakefile, CONTRIB_DIR)
+os.path.walk(os.path.join('..','..','samples'),
+ onSubmakefile, SAMPLES_DIR)
+os.path.walk(os.path.join('..','..','contrib','build'),
+ onSubmakefile, CONTRIB_DIR)
+os.path.walk(os.path.join('..','..','contrib','samples'),
+ onSubmakefile, SAMPLES_DIR)
+os.path.walk(os.path.join('..','..','contrib','utils'),
+ onSubmakefile, SAMPLES_DIR)