echo "changing permissions..."
cd $PRODUCT_INSTALL
-find . -type d | xargs chmod ugo+rx
-find . -name \*.py | xargs chmod ugo+r
-find . -type f -perm 640 | xargs chmod ugo+r
-find . -type d -perm 700 | xargs chmod ugo+rx
-find . -type f -perm 700 | xargs chmod ugo+r
-find . -type f -perm 750 | xargs chmod uo+rx
+find . -type d | xargs -r chmod go+rx
+find . -name \*.py | xargs -r chmod go+r
+find . -type f -perm 640 | xargs -r chmod go+r
+find . -type d -perm 700 | xargs -r chmod go+rx
+find . -type f -perm 700 | xargs -r chmod go+r
+find . -type f -perm 750 | xargs -r chmod go+rx