diff --git a/oci/src/proxmenux_oci/custom.py b/oci/src/proxmenux_oci/custom.py
index 1e42c719..51923334 100644
--- a/oci/src/proxmenux_oci/custom.py
+++ b/oci/src/proxmenux_oci/custom.py
@@ -174,7 +174,7 @@ def template_from_compose(text: str, title: str | None = None) -> dict[str, Any]
 
 def _template_from_stack(compose: dict[str, Any], title: str | None) -> dict[str, Any]:
     """Reuse the catalog stack compiler, keeping explicitly selected image versions."""
-    from .stack import apply_stack_support
+    from .stack import apply_stack_support, normalized_mounts
 
     services = _services(compose)
     singles = {}
@@ -210,9 +210,8 @@ def _template_from_stack(compose: dict[str, Any], title: str | None) -> dict[str
         if 'environment' in services[service['name']]:
             service['compose']['environment'] = copy.deepcopy(services[service['name']]['environment'])
         service['compose']['volumes'] = [
-            mount for mount in service['compose'].get('volumes', [])
-            if (mount.get('target') if isinstance(mount, dict)
-                else str(mount).split(':')[-1]) not in TIME_SETTINGS]
+            mount for mount in normalized_mounts(service['compose'].get('volumes', []))
+            if mount['target'] not in TIME_SETTINGS]
     template['container_contract']['original_compose'] = _dump({
         **template['compose_stack']['top_level'],
         'services': {service['name']: service['compose'] for service in template['compose_stack']['services']}})
diff --git a/oci/tests/test_custom_compose_stacks.py b/oci/tests/test_custom_compose_stacks.py
index 18ca3888..142ffea4 100644
--- a/oci/tests/test_custom_compose_stacks.py
+++ b/oci/tests/test_custom_compose_stacks.py
@@ -55,6 +55,14 @@ class CustomComposeStacks(unittest.TestCase):
             with self.subTest(metadata=metadata), self.assertRaises(ConversionError):
                 custom.template_from_compose(COMPOSE + metadata + '\n')
 
+    def test_short_read_only_time_mount_is_removed_from_stack(self):
+        text = COMPOSE.replace("    ports:", "    volumes: [/etc/localtime:/etc/localtime:ro]\n    ports:")
+        template = custom.template_from_compose(text)
+        app = next(service for service in ordered_services(template) if service['name'] == 'app')
+        self.assertEqual(app['compose']['volumes'], [])
+        self.assertFalse(any('System path' in error for error in template['compatibility']['untranslated_blockers']))
+        self.assertTrue(template['compatibility']['automatic_install_candidate'])
+
     def test_written_digest_and_tag_survive_in_full_image_contracts(self):
         digest = 'sha256:' + 'a' * 64
         reference = 'ghcr.io/example/adminer:4@' + digest