Index: .github/workflows/cross-bootstrap-tools.yml
===================================================================
--- .github/workflows/cross-bootstrap-tools.yml
+++ .github/workflows/cross-bootstrap-tools.yml
@@ -22,7 +22,7 @@
           chmod +x /tmp/llvm.sh
           sudo /tmp/llvm.sh 11
           sudo apt install -y libarchive-dev
-          echo "::set-env name=EXTRA_MAKE_ARGS::--cross-bindir=/usr/lib/llvm-11/bin"
+          echo "EXTRA_MAKE_ARGS=--cross-bindir=/usr/lib/llvm-11/bin" >> $GITHUB_ENV
         if: ${{ startsWith(matrix.os, 'ubuntu') }}
       - name: install LLVM+libarchive (macOS)
         run: brew install llvm coreutils libarchive xz