diff --git a/system/exa/README b/system/exa/README
index 11b0e72f1e..2c08178eb4 100644
--- a/system/exa/README
+++ b/system/exa/README
@@ -1 +1,4 @@
 exa - a replacement for ls written in Rust.
+
+Note:
+rust is required for building exa, but it not needed at runtime.