@@ -6,7 +6,15 @@
 import subprocess
 from pathlib import Path
 
-import tomllib
+try:
+    import tomllib
+except ImportError:
+    try:
+        import tomli as tomllib
+    except ImportError as ie:
+        raise ImportError(
+            "tomli or tomllib is required to parse pyproject.toml"
+        ) from ie
 
 PROJECT_DIR = Path(__file__).resolve().parent
 
 
@@ -0,0 +1,5 @@
+# for babel_runner.py
+setuptools
+Babel
+Jinja2
+tomli; python_version < "3.10"