Build unknown-linux on Ubuntu 20.04

.github/workflows/release.yml

@@ -24,8 +24,10 @@ jobs:
           # Ubuntu
           - target: aarch64-unknown-linux-gnu
             os: ubuntu-latest
+            image: ubuntu:20.04
           - target: x86_64-unknown-linux-gnu
             os: ubuntu-latest
+            image: ubuntu:20.04
           # Mac OS
           - target: aarch64-apple-darwin
             os: macos-latest
@@ -35,7 +37,22 @@ jobs:
           - target: x86_64-pc-windows-msvc
             os: windows-latest
     runs-on: ${{ matrix.os }}
+    container:
+      image: ${{ matrix.image || '' }}
+      options: --privileged
     steps:
+      - name: Configure container
+        if: startsWith(matrix.os, 'ubuntu')
+        run: |
+          apt-get update
+          apt-get --no-install-recommends install -y build-essential ca-certificates curl git jq wget zip
+          mkdir -p -m 755 /etc/apt/keyrings
+          wget -qO- https://cli.github.com/packages/githubcli-archive-keyring.gpg | tee /etc/apt/keyrings/githubcli-archive-keyring.gpg > /dev/null
+          chmod go+r /etc/apt/keyrings/githubcli-archive-keyring.gpg
+          echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | tee /etc/apt/sources.list.d/github-cli.list > /dev/null
+          apt-get update
+          apt-get install gh -y
+          git config --global --add safe.directory $GITHUB_WORKSPACE
       - uses: actions/checkout@v4
       - name: Install Stable + Rustfmt + Clippy
         uses: dtolnay/rust-toolchain@stable