diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 65da8ca9..ff206842 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -38,7 +38,7 @@ jobs:
             cxx_flags: "-stdlib=libstdc++"
           - version: 19
             compiler: clang
-            install: wget https://apt.llvm.org/llvm.sh && chmod +x llvm.sh && sudo ./llvm.sh 19
+            install: wget https://apt.llvm.org/llvm.sh && chmod +x llvm.sh && sudo ./llvm.sh 19 all
             toolchain_root: "/usr/lib/llvm-19"
           - version: 19
             compiler: clang
@@ -110,6 +110,13 @@ jobs:
           ${{ matrix.install }}
           sudo apt install -y ninja-build
 
+      - name: Install libclang for string catalog
+        run: |
+          python3 -m venv ${{github.workspace}}/test_venv
+          source ${{github.workspace}}/test_venv/bin/activate
+          pip install libclang
+          echo "${{github.workspace}}/test_venv/bin" >> $GITHUB_PATH
+
       - name: Restore CPM cache
         env:
           cache-name: cpm-cache-0
diff --git a/test/log/catalog_extra.json b/test/log/catalog_extra.json
index 770af1f6..983e80a5 100644
--- a/test/log/catalog_extra.json
+++ b/test/log/catalog_extra.json
@@ -1,3 +1,11 @@
 {
-    "extra_key": "extra_value"
+    "extra_key": "extra_value",
+    "enums": {
+        "ns::E": {
+            "17": "extra_value"
+        },
+        "extra_enum": {
+            "1": "value"
+        }
+    }
 }
diff --git a/tools/gen_str_catalog.py b/tools/gen_str_catalog.py
index 9fd9bb27..485e667c 100755
--- a/tools/gen_str_catalog.py
+++ b/tools/gen_str_catalog.py
@@ -124,7 +124,7 @@ def get_id(stable_ids, key_fn, gen, obj):
 
     unique_strings = {i[0][0]: i for i in strings}.values()
     return (
-        {m: {"string": module_string(m), "id": get_module_id(m)} for m in set(modules)},
+        {m: {"string": module_string(m), "id": get_module_id(m)} for m in sorted(set(modules))},
         {item[0]: {**item[1], "id": get_msg_id(item[1])} for item in unique_strings},
     )
 
@@ -204,15 +204,20 @@ def write_json(messages, modules, enums, extra_inputs: list[str], filename: str,
         if not mod in d["modules"]:
             d["modules"].append(mod)
 
-    es = dict()
-    for (k, (_, v)) in enums.items():
-        es.update({k: {value: name for (name, value) in v.items()}})
-
-    str_catalog = dict(**d, enums=es)
+    str_catalog = dict(**d, enums=dict())
     for extra in extra_inputs:
         with open(extra, "r") as f:
             str_catalog.update(json.load(f))
 
+    es = dict()
+    for (k, (_, v)) in enums.items():
+        es.update({k: {value: name for (name, value) in v.items()}})
+    for (k, v) in es.items():
+        if k in str_catalog["enums"]:
+            str_catalog["enums"][k].update(v) # type: ignore
+        else:
+            str_catalog["enums"].update({k: v}) # type: ignore
+
     with open(filename, "w") as f:
         json.dump(str_catalog, f, indent=4)