diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f72139c..6b7eb1b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -28,7 +28,11 @@ jobs:
 
     steps:
     - name: Setup SSH
-      run: ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts
+      run: |
+        set -ex
+        mkdir -p -m 700 ~/.ssh
+        ssh-keygen -N '' -f ~/.ssh/id_rsa
+        ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts
 
     - uses: actions/checkout@v3