diff --git a/.github/workflows/nix.yaml b/.github/workflows/nix.yaml
index 47918b8b..0f452e24 100644
--- a/.github/workflows/nix.yaml
+++ b/.github/workflows/nix.yaml
@@ -7,7 +7,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v27
+    - uses: cachix/install-nix-action@v25
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v14
+      with:
+        name: sc-tools
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
     # This checks the packages compile with the flake checks, see `flake.nix` for detials
     - name: Flake check
       run: nix flake check
diff --git a/README.md b/README.md
index d2da3d4f..fb1b9095 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ A collection of libraries that are helpful for building Cardano apps with Haskel
 * `convex-coin-selection`: Coin selection and transaction balancing
 * `convex-mockchain`: Minimal mockchain for tests
 * `convex-optics`: Some optics for plutus-ledger-api and cardano-api
+
 The API documentation (Haddocks) is published [here](https://j-mueller.github.io/sc-tools/)
 
 ### Dependencies
diff --git a/flake.nix b/flake.nix
index 0d0ee25c..37bdecb4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -52,6 +52,7 @@
         in
         {
           devShells = flake.devShells;
+          packages = flake.packages;
           checks = {
             build-all = pkgs.runCommandCC "check all cabal.project pagackes"
               {