diff --git a/lib/nova_plugins/functions-libvirt b/lib/nova_plugins/functions-libvirt
index 5525cfd951..78c59786d8 100644
--- a/lib/nova_plugins/functions-libvirt
+++ b/lib/nova_plugins/functions-libvirt
@@ -23,7 +23,7 @@ DEBUG_LIBVIRT=$(trueorfalse True DEBUG_LIBVIRT)
 # Installs required distro-specific libvirt packages.
 function install_libvirt {
     if is_ubuntu; then
-        if is_arch "aarch64" && [[ ${DISTRO} =~ (trusty|utopic) ]]; then
+        if is_arch "aarch64" && [[ ${DISTRO} == "trusty" ]]; then
             install_package qemu-system
         else
             install_package qemu-kvm
diff --git a/stack.sh b/stack.sh
index 80247317cf..bdbb025a0b 100755
--- a/stack.sh
+++ b/stack.sh
@@ -178,7 +178,7 @@ source $TOP_DIR/stackrc
 
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``FORCE=yes ./stack``
-if [[ ! ${DISTRO} =~ (precise|trusty|utopic|vivid|7.0|wheezy|sid|testing|jessie|f21|f22|rhel7) ]]; then
+if [[ ! ${DISTRO} =~ (precise|trusty|vivid|7.0|wheezy|sid|testing|jessie|f21|f22|rhel7) ]]; then
     echo "WARNING: this script has not been tested on $DISTRO"
     if [[ "$FORCE" != "yes" ]]; then
         die $LINENO "If you wish to run this script anyway run with FORCE=yes"