diff --git a/cli/dts/README.md b/cli/dts/README.md
index bfa022109d40372c2530a1d552413e38291b6f8c..f37c903df18f55a1e8e77ff834f8cd75024467de 100644
--- a/cli/dts/README.md
+++ b/cli/dts/README.md
@@ -14,6 +14,6 @@ So that might look something like this:
 git clone https://github.com/microsoft/TypeScript.git
 cd typescript
 git checkout v3.9.7
-cp lib/typescript.js ~/src/deno/cli/tsc/00_typescript.js
-cp lib/*.d.ts ~/src/deno/cli/dts/
+rsync lib/typescript.js ~/src/deno/cli/tsc/00_typescript.js
+rsync --exclude=protocol.d.ts --exclude=tsserverlibrary.d.ts --exclude=typescriptServices.d.ts lib/*.d.ts ~/src/deno/cli/dts/
 ```