diff --git a/.github/workflows/ci-nix.yaml b/.github/workflows/ci-nix.yaml
index 499a2e4aa00..be7496d6242 100644
--- a/.github/workflows/ci-nix.yaml
+++ b/.github/workflows/ci-nix.yaml
@@ -138,6 +138,9 @@ jobs:
   benchmarks:
     name: "Benchmarks"
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
     strategy:
       matrix:
         include:
@@ -170,6 +173,11 @@ jobs:
         name: cardano-scaling
         authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'
 
+    - name: ❄ Magic nix
+      uses: DeterminateSystems/magic-nix-cache-action@main
+      with:
+        source-url: https://github.com/locallycompact/magic-nix-cache
+
     - name: 📈 Benchmark
       run: |
         mkdir -p benchmarks
@@ -232,6 +240,10 @@ jobs:
   nix-flake-check:
     name: "nix flake check"
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+
     steps:
     - name: 📥 Checkout repository
       uses: actions/checkout@v4
@@ -243,20 +255,27 @@ jobs:
           accept-flake-config = true
           log-lines = 1000
 
-    - name: ❄ Cachix cache of nix derivations
-      uses: cachix/cachix-action@v15
+    - name: ❄ Magic nix
+      uses: DeterminateSystems/magic-nix-cache-action@main
       with:
-        name: cardano-scaling
-        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'
+        source-url: https://github.com/locallycompact/magic-nix-cache
+
+    - run: cat ~/.config/nix/nix.conf
+
+    - run: cat /etc/nix/nix.conf
 
     - name: ❄ Nix Flake Check
       run: |
-        nix flake check -L
+       nix flake check -L
 
 
   build-specification:
     name: "Build specification using nix"
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+
     steps:
     - name: 📥 Checkout repository
       uses: actions/checkout@v4
@@ -274,6 +293,11 @@ jobs:
         name: cardano-scaling
         authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'
 
+    - name: ❄ Magic nix
+      uses: DeterminateSystems/magic-nix-cache-action@main
+      with:
+        source-url: https://github.com/locallycompact/magic-nix-cache
+
     - name: ❄ Build specification PDF
       run: |
         nix build .#spec && cp result/*.pdf spec/
diff --git a/README.md b/README.md
index f448c1ff38d..4c8cd30be97 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 # <p align="center">Hydra :dragon_face:</p>
 
+
 <div align="center">
   <p>Implementation of the Hydra scalability protocols.</p>
   <a href='https://github.com/cardano-scaling/hydra/actions'><img src="https://img.shields.io/github/actions/workflow/status/cardano-scaling/hydra/ci-nix.yaml?branch=master&label=Tests&style=for-the-badge" /></a>
diff --git a/flake.nix b/flake.nix
index f797d58d92c..36a575f3006 100644
--- a/flake.nix
+++ b/flake.nix
@@ -173,17 +173,4 @@
         };
     };
 
-  nixConfig = {
-    extra-substituters = [
-      "https://cache.iog.io"
-      "https://hydra-node.cachix.org"
-      "https://cardano-scaling.cachix.org"
-    ];
-    extra-trusted-public-keys = [
-      "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
-      "hydra-node.cachix.org-1:vK4mOEQDQKl9FTbq76NjOuNaRD4pZLxi1yri31HHmIw="
-      "cardano-scaling.cachix.org-1:RKvHKhGs/b6CBDqzKbDk0Rv6sod2kPSXLwPzcUQg9lY="
-    ];
-    allow-import-from-derivation = true;
-  };
 }