diff --git a/roles/bootstrap-os/files/bootstrap.sh b/roles/bootstrap-os/files/bootstrap.sh
index 69b7b7568fec394548776afe2dc22309d0668ef9..4c479a14c92e08be4b70daae7ef0fb2929b7ac19 100755
--- a/roles/bootstrap-os/files/bootstrap.sh
+++ b/roles/bootstrap-os/files/bootstrap.sh
@@ -39,4 +39,8 @@ mv -n "${PYPY_FILENAME}" pypy3
 ln -s ./pypy3/bin/pypy3 python
 $BINDIR/python --version
 
+# install PyYAML
+./python -m ensurepip
+./python -m pip install pyyaml
+
 touch $BINDIR/.bootstrapped
diff --git a/roles/kubernetes/preinstall/tasks/0081-ntp-configurations.yml b/roles/kubernetes/preinstall/tasks/0081-ntp-configurations.yml
index 4efe1e3a1db28b3f8de3ffcd3f71accbf256556b..ad00df3c2529720883d795520a4d9452c0258b46 100644
--- a/roles/kubernetes/preinstall/tasks/0081-ntp-configurations.yml
+++ b/roles/kubernetes/preinstall/tasks/0081-ntp-configurations.yml
@@ -30,7 +30,7 @@
     ntp_service_name: >-
       {% if ntp_package == "chrony" -%}
       chronyd
-      {%- elif ansible_os_family == 'RedHat' -%}
+      {%- elif ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk", "RedHat"] -%}
       ntpd
       {%- else -%}
       ntp