diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 556cd515..c2cb68a2 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -14,6 +14,8 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
+      with:
+        ssh-key: ${{ secrets.WORKFLOW_SSH_KEY }}
 
     - name: Install Nix
       uses: cachix/install-nix-action@v18