diff --git a/spcd/act.py b/spcd/act.py
index 68ea759..203528e 100644
--- a/spcd/act.py
+++ b/spcd/act.py
@@ -12,7 +12,7 @@ from spcd.shell import env
 
 def action() -> None:
     """Display action inputs."""
-    prefix = ""
+    prefix = "INPUT_"
     for variable, value in sorted(projects.environment.items()):
         if variable.startswith(prefix):
             log.info("%s = %s", variable, value)