diff --git a/README.md b/README.md
index 175e069b..42a90f07 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,20 @@ Running `nix develop` will create a shell with the default beta Rust toolchain i
 
 ```
 
+#### Change Default `DistRoot`:
+
+- e.g. `RUSTUP_DIST_SERVER`=`"https://example.com"`
+
+Just replace `rust-overlay.overlays.default` or `(import rust-overlay)` into:
+
+```nix
+(final: prev: {
+  rust-bin = rust-overlay.lib.mkRustBin { distRoot = "https://example.com/dist"; } prev;
+})
+```
+
+For more information, see [reference.md](./docs/reference.md).
+
 ### Migration from [nixpkgs-mozilla]
 
 1. Change the channel URL to `https://github.com/oxalica/rust-overlay/archive/master.tar.gz`,