diff --git a/snakedeploy/conda.py b/snakedeploy/conda.py
index 96b044a..8f7e26a 100644
--- a/snakedeploy/conda.py
+++ b/snakedeploy/conda.py
@@ -194,7 +194,12 @@ def get_pkg_versions(conda_env_path):
 
         def downgraded():
             for pkg_name, version in posterior_pkg_versions.items():
-                version = packaging_version.parse(version)
+                try:
+                    version = packaging_version.parse(version)
+                except packaging_version.InvalidVersion as e:
+                    raise UserError(
+                        f"Cannot parse version {version} of package {pkg_name}: {e}"
+                    )
                 prior_version = prior_pkg_versions.get(pkg_name)
                 if prior_version is not None and version < packaging_version.parse(
                     prior_version
@@ -297,6 +302,9 @@ def add_file(self, filepath, content, is_updated, msg):
 
     @retry(tries=2, delay=60)
     def create(self):
+        import pdb
+
+        pdb.set_trace()
         if not self.files:
             logger.info("No files to commit.")
             return