diff --git a/app/build_tree.go b/app/build_tree.go
index 69ae00f..2cdd083 100644
--- a/app/build_tree.go
+++ b/app/build_tree.go
@@ -40,6 +40,9 @@ func BuildTree(ctx context.Context, c Config) error {
 		}
 
 		filepath.Walk(absPath, func(p string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
 			if info.IsDir() {
 				return nil
 			}