diff --git a/MANIFEST.in b/MANIFEST.in
index c1fb2ea75..c1fce3b5a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,2 +1,3 @@
 include src/lerobot/templates/lerobot_modelcard_template.md
 include src/lerobot/datasets/card_template.md
+include src/lerobot/envs/metaworld_config.json
diff --git a/pyproject.toml b/pyproject.toml
index ea3df4a6d..b6d85b0f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -214,6 +214,9 @@ lerobot-edit-dataset="lerobot.scripts.lerobot_edit_dataset:main"
 lerobot-setup-can="lerobot.scripts.lerobot_setup_can:main"
 
 # ---------------- Tool Configurations ----------------
+[tool.setuptools.package-data]
+lerobot = ["envs/*.json"]
+
 [tool.setuptools.packages.find]
 where = ["src"]
 
diff --git a/src/lerobot/utils/control_utils.py b/src/lerobot/utils/control_utils.py
index 7cfe177ef..7c605af17 100644
--- a/src/lerobot/utils/control_utils.py
+++ b/src/lerobot/utils/control_utils.py
@@ -189,7 +189,7 @@ def sanity_check_dataset_name(repo_id, policy_cfg):
     # Check if dataset_name starts with "eval_" but policy is missing
     if dataset_name.startswith("eval_") and policy_cfg is None:
         raise ValueError(
-            f"Your dataset name begins with 'eval_' ({dataset_name}), but no policy is provided ({policy_cfg.type})."
+            f"Your dataset name begins with 'eval_' ({dataset_name}), but no policy is provided."
         )
 
     # Check if dataset_name does not start with "eval_" but policy is provided