diff --git a/tools/cargo/build.rs b/tools/cargo/build.rs
index b8ff9dda..c0a94bcb 100644
--- a/tools/cargo/build.rs
+++ b/tools/cargo/build.rs
@@ -12,7 +12,7 @@ Either use:
 
 prior to cloning, or else use:
 
-   $ git clone -c core.symlinks=true ...
+   $ git clone -c core.symlinks=true https://github.com/dtolnay/cxx
 
 for the clone.