diff --git a/.github/workflows/build-machines-and-homes.yml b/.github/workflows/build-machines-and-homes.yml
index e8bb79c..25e1a99 100644
--- a/.github/workflows/build-machines-and-homes.yml
+++ b/.github/workflows/build-machines-and-homes.yml
@@ -10,9 +10,6 @@ env:
     experimental-features = nix-command flakes
     accept-flake-config = true
     system-features = nixos-test benchmark big-parallel kvm
-    secret-key-files = ~/cache-priv-key.pem
-    extra-substituters = https://nixcache.cy7.sh
-    extra-trusted-public-keys = nixcache.cy7.sh:DN3d1dt0wnXfTH03oVmTee4KgmdNdB0NY3SuzA8Fwx8=
   TERM: ansi
   AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
   AWS_SECRET_ACCESS_KEY: ${{ secrets. AWS_SECRET_ACCESS_KEY }}
@@ -39,8 +36,6 @@ jobs:
           remove-codeql: 'true'
           remove-docker-images: 'true'
           build-mount-path: /nix
-      - name: setup binary cache key
-        run: echo "${{ secrets.NIX_CACHE_SECRET_KEY }}" >> ~/cache-priv-key.pem
       - name: Install Nix
         uses: cachix/install-nix-action@v30
       - name: Sync repository
@@ -78,8 +73,6 @@ jobs:
           remove-codeql: 'true'
           remove-docker-images: 'true'
           build-mount-path: /nix
-      - name: setup binary cache key
-        run: echo "${{ secrets.NIX_CACHE_SECRET_KEY }}" >> ~/cache-priv-key.pem
       - name: Install Nix
         uses: cachix/install-nix-action@v30
       - name: Sync repository