diff --git a/release_drafter.py b/release_drafter.py
index b7a0894..e344300 100644
--- a/release_drafter.py
+++ b/release_drafter.py
@@ -10,6 +10,12 @@ import semver
 from requests.adapters import HTTPAdapter
 from urllib3 import Retry
 
+print("DEBUG: env vars seen by Python")
+for k, v in os.environ.items():
+    if k.startswith("INPUT_"):
+        print(f"{k}={v}")
+
+
 @dataclass
 class LabelConfig:
     priority: int