diff --git a/README.md b/README.md
index 887daa91..3b937ad0 100644
--- a/README.md
+++ b/README.md
@@ -194,6 +194,8 @@ Compiling my-rust-proj v0.1.0
 #…
 ```
 
+The `dev` tool requires our shell integration to work.
+
 > [docs.pkgx.sh/dev][dev]