diff --git a/docs/extending/dev-setup.mdx b/docs/extending/dev-setup.mdx
index 1729a5253..8b069b8f1 100644
--- a/docs/extending/dev-setup.mdx
+++ b/docs/extending/dev-setup.mdx
@@ -74,6 +74,8 @@ Tip: start with `yarn start --fast-refresh` for experimental fast refresh.
 
 <FbInternalOnly>
 
+Note: All these steps must be run on a local machine (e.g. laptop) and development cannot be done on a Dev Server or OnDemand as Flipper is a desktop application.
+
 ```bash
 fbclone fbsource --sparse tools/scm/sparse/xplat/flipper-js
 cd ~/fbsource/xplat/sonar/desktop