diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index a82aa18..5578416 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -50,7 +50,7 @@ jobs:
       - name: Install toolchain
         run: sudo apt-get install -qy liblzma-dev gcc make pkgconf musl-dev musl-tools rustup
       - name: install rust target
-        run: rustup toolchain install beta -t aarch64-unknown-linux-musl --no-self-update
+        run: rustup toolchain install beta -t aarch64-unknown-linux-musl -c rust-src --no-self-update
 
       - name: build example -- musl release
         run: cd example && make clean && make TARGET=aarch64-unknown-linux-musl PROFILE=release MUSL=1 CARGO="rustup run beta cargo"
diff --git a/example/Makefile b/example/Makefile
index 9f1ff5f..a35aa5c 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -92,7 +92,7 @@ all: $(_bins)
 clean: clean-c clean-rust
 
 clean-c:
-	rm -r out || true
+	rm -r $(OUT_DIR) || true
 
 clean-rust:
 	rm $(SERVICEPOINT_HEADER_OUT)/servicepoint.h || true