diff --git a/dev-packages/rollup-utils/npmHelpers.mjs b/dev-packages/rollup-utils/npmHelpers.mjs
index 5aa38817686a..0537032d8bdd 100644
--- a/dev-packages/rollup-utils/npmHelpers.mjs
+++ b/dev-packages/rollup-utils/npmHelpers.mjs
@@ -68,6 +68,9 @@ export function makeBaseNPMConfig(options = {}) {
       // output individual files rather than one big bundle
       preserveModules: true,
 
+      // Don't hoist imports into entrypoints
+      // should be ignored when `preserveModules` is used,
+      // but Rollup still includes them when hoisting transitive imports.
       hoistTransitiveImports: false,
 
       // Allow wrappers or helper functions generated by rollup to use any ES2015 features