diff --git a/.github/workflows/ci-nix.yaml b/.github/workflows/ci-nix.yaml
index d0d99d25918..779783674e5 100644
--- a/.github/workflows/ci-nix.yaml
+++ b/.github/workflows/ci-nix.yaml
@@ -92,7 +92,7 @@ jobs:
 
   haddock:
     name: "Build haddock using nix"
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, nixos]
     steps:
     - name: 📥 Checkout repository
       uses: actions/checkout@v4
@@ -104,12 +104,6 @@ jobs:
           accept-flake-config = true
           log-lines = 1000
 
-    - name: ❄ Cachix cache of nix derivations
-      uses: cachix/cachix-action@v15
-      with:
-        name: cardano-scaling
-        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'
-
     - name: 📚 Documentation (Haddock)
       run: |
         nix build .#haddocks