c3-lang/libffi

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3a896be..60956bd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -121,7 +121,7 @@ jobs:
           (cd autoconf-2.71; ./configure --prefix=$HOME/i; make; make install)
           rm -rf autoconf-2.71
           PATH=$HOME/i/bin:$PATH ./autogen.sh
-          echo ${{ secrets.CFARM_KEY }} > /tmp/cfk
+          echo "${{ secrets.CFARM_KEY }}" > /tmp/cfk
           ls -l /tmp/cfk
           ssh -i /tmp/cfk ${{ matrix.CFARM_HOST }} "mkdir -p t/$GITHUB_RUN_NUMBER"
           rsync -avrz -e "ssh -i /tmp/cfk" * ${{ matrix.CFARM_HOST }}:t/$GITHUB_RUN_NUMBER