diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6a4f9078..8caf9b38 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,11 @@ jobs:
       - name: Install nix
         uses: cachix/install-nix-action@v16
 
+      - uses: cachix/cachix-action@v12
+        with:
+          name: christianharke
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
       - name: Build command (x86_64)
         if: matrix.system == 'x86_64'
         env:
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 78b1cf94..a8af9245 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -20,6 +20,11 @@ jobs:
       - name: Install nix
         uses: cachix/install-nix-action@v16
 
+      - uses: cachix/cachix-action@v12
+        with:
+          name: christianharke
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
       - name: Update inputs
         run: nix flake update