diff --git a/builder/main.py b/builder/main.py
index c6f63297e..b3f759dee 100755
--- a/builder/main.py
+++ b/builder/main.py
@@ -33,7 +33,7 @@ def run_action(action, env):
     # Set build environment from config
     env.shell.pushenv()
     for var, value in getattr(env, 'env', {}).items():
-        env.shell.setenv(var, value)
+        env.shell.setenv(var, value, is_secret=True)
 
     if isinstance(action, str):
         action_cls = Scripts.find_action(action)