diff --git a/examples/alertmanager-config-template-external.jsonnet b/examples/alertmanager-config-template-external.jsonnet
index 420c34d5b8ddd0131f87c3aaaf444af06fb0968b..73b3ee4fd7cf521522b76aea16cd7a0a4decc4f5 100644
--- a/examples/alertmanager-config-template-external.jsonnet
+++ b/examples/alertmanager-config-template-external.jsonnet
@@ -1,28 +1,35 @@
 local configmap(name, namespace, data) = {
-    apiVersion: "v1",
-    kind: "ConfigMap",
-    metadata : {
-        name: name,
-        namespace: namespace,
-    },
-    data: data,
- };
+  apiVersion: 'v1',
+  kind: 'ConfigMap',
+  metadata: {
+    name: name,
+    namespace: namespace,
+  },
+  data: data,
+};
 
 local kp =
-    // different libsonnet imported
+  // different libsonnet imported
   {
-      configmap+:: {
-          'alert-templates': configmap(
-          'alertmanager-alert-template.tmpl',
-          $._config.namespace,
-          {"data": importstr 'alertmanager-alert-template.tmpl'},
-          )
+    values+:: {
+      common+: {
+        namespace: 'monitoring',
       },
-      alertmanager+:{
-            spec+:{
-                # the important field configmaps:
-                configMaps: ['alert-templates',], # goes to etc/alermanager/configmaps
-            },
+    },
+    alertmanager+:: {
+      alertmanager+: {
+        spec+: {
+          // the important field configmaps:
+          configMaps: ['alert-templates'],  // goes to etc/alermanager/configmaps
+        },
       },
-};
+    },
+    configmap+:: {
+      'alert-templates': configmap(
+        'alertmanager-alert-template.tmpl',
+        $.values.common.namespace,  // could be $._config.namespace to assign namespace once
+        { data: importstr 'alertmanager-alert-template.tmpl' },
+      ),
+    },
+  };
 { [name + '-configmap']: kp.configmap[name] for name in std.objectFields(kp.configmap) }