diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 6ea65f5..d8ec700 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -9,17 +9,10 @@ on:
   workflow_dispatch:
 jobs:
   docs:
-    strategy:
-      matrix:
-        os: [ ubuntu-20.04 ]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
       - uses: cachix/install-nix-action@v31
-      - uses: cachix/cachix-action@v16
-        with:
-          name: numtide
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
       - run: |
           nix-build -A docs
           cp -r "$(readlink ./result)" book