diff --git a/src/bootstrap/src/core/build_steps/doc.rs b/src/bootstrap/src/core/build_steps/doc.rs
index a918ae929d2e0..e6ef8b7b83417 100644
--- a/src/bootstrap/src/core/build_steps/doc.rs
+++ b/src/bootstrap/src/core/build_steps/doc.rs
@@ -953,6 +953,16 @@ impl Step for Rustc {
         cargo.rustdocflag("--extern-html-root-url");
         cargo.rustdocflag("ena=https://docs.rs/ena/latest/");
 
+        // Link std crates to local docs. Installed layout:
+        //   html/            <- std docs (core/, std/, alloc/, ...)
+        //   html/rustc-docs/ <- compiler docs
+        // `../../` from rustc-docs/*/index.html reaches html/.
+        for krate in STD_PUBLIC_CRATES {
+            cargo.rustdocflag("--extern-html-root-url");
+            cargo.rustdocflag(&format!("{krate}=../../"));
+        }
+        cargo.rustdocflag("--extern-html-root-takes-precedence");
+
         let mut to_open = None;
 
         let out_dir = builder.stage_out(build_compiler, Mode::Rustc).join(target).join("doc");