diff --git a/packer/common-packer b/packer/common-packer
index edc12fd..4a5b0cd 160000
--- a/packer/common-packer
+++ b/packer/common-packer
@@ -1 +1 @@
-Subproject commit edc12fdbd0d43bd54bdd79dfd16d349506a16bb7
+Subproject commit 4a5b0cd9032938194c4813fe36663ddee4f9e60e
diff --git a/packer/provision/baseline.sh b/packer/provision/baseline.sh
index a087efa..e34d7b8 100644
--- a/packer/provision/baseline.sh
+++ b/packer/provision/baseline.sh
@@ -213,8 +213,14 @@
 
     echo "---> Updating operating system"
 
+    # Change made 2018-07-09 by zdw
+    # per discussion on #lf-releng, the upstream Ubuntu image changed to be
+    # missing add-apt-repository, so the next command failed.
+    apt-get update -m
+    apt-get install -y software-properties-common
+
     # add additional repositories
-    sudo add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe restricted multiverse"
+    add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe restricted multiverse"
 
     echo "---> Installing base packages"
     apt-get clean