diff --git a/precise/base-0k/hooks/install.d/05-shyaml.sh b/precise/base-0k/hooks/install.d/05-shyaml.sh
index 6116a12..84f7a28 100755
--- a/precise/base-0k/hooks/install.d/05-shyaml.sh
+++ b/precise/base-0k/hooks/install.d/05-shyaml.sh
@@ -7,7 +7,7 @@ set -eux
 case $(lsb_release -is) in
     Debian)
         case $(lsb_release -rs) in
-            11)
+            11|12)
                 apt-get install -y python3-pip libyaml-dev python3-dev </dev/null
                 ;;
             *)
@@ -30,4 +30,5 @@ case $(lsb_release -is) in
         ;;
 esac
 
-pip install shyaml --upgrade
+pip install shyaml --upgrade ||
+    pip install shyaml --upgrade --break-system-packages
diff --git a/precise/host/hooks/install.d/70-0k.sh b/precise/host/hooks/install.d/70-0k.sh
index f4aabbd..1e4fb29 100755
--- a/precise/host/hooks/install.d/70-0k.sh
+++ b/precise/host/hooks/install.d/70-0k.sh
@@ -30,7 +30,8 @@ mkdir -p /opt/apps
     if [ "$(python -c 'import setuptools' 2>&1 | tail -n 1)" == "ImportError: No module named setuptools" ]; then
         pip install setuptools
     fi
-    pip install sact.epoch
+    pip install sact.epoch ||
+        pip install sact.epoch --break-system-packages
     if [ "$(python -c 'import sact.epoch' 2>&1 | tail -n 1)" == "ImportError: No module named interface" ]; then
         echo "Error: conflicting installation of zope.interface detected. Trying workaround."
         (