set cflags

.github/workflows/release.yml

@@ -52,12 +52,13 @@ jobs:
           echo "using version tag ${GITHUB_REF:10}"
           echo ::set-output name=version::"${GITHUB_REF:10}"
 
-      - name: Install musl-tools (Linux)
+      - name: Install C compilation tooling (Linux)
         if: matrix.os == 'ubuntu-latest'
         run: |
           sudo apt-get update -y
           sudo apt-get install clang libc6-dev-arm64-cross -y
           echo "TARGET_CC=clang" >> $GITHUB_ENV
+          echo "CFLAGS_aarch64_unknown_linux_musl=--sysroot=/usr/aarch64-linux-gnu" >> $GITHUB_ENV
           echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER=/usr/aarch64-linux-gnu/bin/ld" >> $GITHUB_ENV
 
       - name: Install p7zip (MacOS)