diff --git a/picca_bookkeeper/tasker.py b/picca_bookkeeper/tasker.py
index caacb7f..9cabb7a 100644
--- a/picca_bookkeeper/tasker.py
+++ b/picca_bookkeeper/tasker.py
@@ -346,7 +346,7 @@ def _make_env_opts(self) -> str:
         else:
             text = ""
 
-        if "sh" in self.environment:
+        if self.environment.endswith(".sh"):
             activate = "source "
         else:
             activate = "conda activate "