diff --git a/tools/naming/simulator/driver.go b/tools/naming/simulator/driver.go
index 4f944ca..e27e4bb 100644
--- a/tools/naming/simulator/driver.go
+++ b/tools/naming/simulator/driver.go
@@ -19,6 +19,7 @@
 	"veyron.io/veyron/veyron2/rt"
 
 	"veyron.io/veyron/veyron/lib/expect"
+	"veyron.io/veyron/veyron/lib/flags/consts"
 	"veyron.io/veyron/veyron/lib/modules"
 	"veyron.io/veyron/veyron/lib/modules/core"
 	_ "veyron.io/veyron/veyron/profiles"
@@ -111,7 +112,7 @@
 
 	shell := modules.NewShell()
 	defer shell.Cleanup(os.Stderr, os.Stderr)
-	if os.Getenv("VEYRON_CREDENTIALS") == "" {
+	if os.Getenv(consts.VeyronCredentials) == "" {
 		shell.CreateAndUseNewCredentials()
 	}