diff --git a/Dockerfile b/Dockerfile
index 1104577..25cd0c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,10 @@
 #!BuildTag: opensuse/tumbleweed/virt-controller:%%PKG_VERSION%%.%RELEASE%
 
 # virt-controller container image
-FROM opensuse/tumbleweed
+# KUBEVIRTFROM defined in prjconf, e.g.
+#  BuildFlags: dockerarg:KUBEVIRTFROM=opensuse/tumbleweed
+ARG KUBEVIRTFROM
+FROM $KUBEVIRTFROM
 
 # labelprefix=org.opensuse.kubevirt
 PREFIXEDLABEL org.opencontainers.image.title="kubevirt virt-controller container"
diff --git a/virt-controller-container.changes b/virt-controller-container.changes
index 7661be9..85231af 100644
--- a/virt-controller-container.changes
+++ b/virt-controller-container.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Nov 17 23:00:12 UTC 2020 - James Fehlig <jfehlig@suse.com>
+
+- use ARG for defining base image
+
 -------------------------------------------------------------------
 Tue Sep 15 03:14:13 UTC 2020 - James Fehlig <jfehlig@suse.com>