diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index de0282c..dee38bf 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -66,7 +66,7 @@ jobs:
       - name: Install toolchain
         run: sudo apt-get install -qy liblzma-dev gcc make pkgconf musl-dev musl-tools rustup
       - name: install rust targets
-        run: rustup toolchain install nightly -t aarch64-unknown-linux-musl -t aarch64-unknown-linux-gnu -c rust-src --no-self-update
+        run: rustup toolchain install nightly -t aarch64-unknown-linux-musl -t aarch64-unknown-linux-gnu --no-self-update
 
       - name: build example -- glibc size-optimized
         run: cd example && make clean && make TARGET=aarch64-unknown-linux-gnu PROFILE=size-optimized CARGO="rustup run nightly cargo"