diff --git a/cmd/build.go b/cmd/build.go
index 5f138a8..b89a047 100644
--- a/cmd/build.go
+++ b/cmd/build.go
@@ -51,7 +51,7 @@ func init() {
 	buildCmd.PersistentFlags().StringVarP(&buildParam.name, "name", "n", "", "oci target image name")
 	buildCmd.PersistentFlags().StringVarP(&buildParam.tag, "tag", "t", "latest", "oci target image tag")
 
-	buildCmd.PersistentFlags().StringVarP(&buildParam.folder, "folder", "f", ".", "oci image tag")
+	buildCmd.PersistentFlags().StringVarP(&buildParam.folder, "folder", "f", ".", "build folder")
 	buildCmd.PersistentFlags().Var(
 		newPlatformSliceValue(AllPlatforms, &buildParam.platforms),
 		"platforms",