diff --git a/kolla/image/build.py b/kolla/image/build.py
index 28318c299e..8b514d1b00 100755
--- a/kolla/image/build.py
+++ b/kolla/image/build.py
@@ -160,6 +160,9 @@ UNBUILDABLE_IMAGES = {
         "telegraf",      # no binary package
     },
     'ubuntu': {
+        "bifrost-base",  # FIXME(yoctozepto): we want to support it but it is
+                         # blocking gate atm due to py3 on Ubuntu
+                         # see https://bugs.launchpad.net/kolla/+bug/1860229
         "cyborg-base",
         "qdrouterd",  # There is no qdrouterd package for ubuntu bionic
     },