fix(ci): nightly build fails

See-also: rust-lang/rust#128808

Author: andelf

.github/workflows/build.yml

@@ -26,8 +26,8 @@ jobs:
           rustup target add riscv32imac-unknown-none-elf
           rustup target add riscv32imafc-unknown-none-elf
           rustup target add riscv32i-unknown-none-elf
-          rustup component remove rust-src
-          rustup component add rust-src
+          # See https://github.com/rust-lang/rust/issues/12880
+          touch ~/.rustup/toolchains/nightly-aarch64-apple-darwin/lib/rustlib/src/rust/Cargo.lock
       - name: Fetch Deps
         # if this is a pull request
         if: github.event_name == 'pull_request'