diff --git a/.github/workflows/crates-release.yml b/.github/workflows/crates-release.yml
index 4e483e55b..7db6bee48 100644
--- a/.github/workflows/crates-release.yml
+++ b/.github/workflows/crates-release.yml
@@ -35,6 +35,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: Use nix cache
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: Check the bump is consistent and publishable
         env:
           BASE_SHA: ${{ github.event.pull_request.base.sha }}
@@ -59,6 +61,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: Use nix cache
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: Compute tag metadata
         id: meta
         env:
@@ -155,6 +159,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: Use nix cache
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: Download packaged crate
         uses: actions/download-artifact@v4
         with:
@@ -198,6 +204,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: Use nix cache
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: Download packaged crate
         uses: actions/download-artifact@v8
         with:
diff --git a/.github/workflows/csharp.yml b/.github/workflows/csharp.yml
index b3088276c..f4dde6b85 100644
--- a/.github/workflows/csharp.yml
+++ b/.github/workflows/csharp.yml
@@ -39,6 +39,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: "Use nix cache"
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: "Build and test"
         run: nix develop .#csharp -c ./payjoin-ffi/csharp/contrib/test.sh
 
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 766cf77b6..f1740156b 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -1,4 +1,4 @@
-name: Continuous integration
+name: Formatting
 
 on: [push, pull_request]
 
@@ -12,6 +12,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: "Use nix cache"
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: Run treefmt
         run: |
           set -eo pipefail
diff --git a/.github/workflows/javascript.yml b/.github/workflows/javascript.yml
index 3ceaf582e..0feafb77d 100644
--- a/.github/workflows/javascript.yml
+++ b/.github/workflows/javascript.yml
@@ -29,5 +29,7 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: "Use nix cache"
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: "Build and test"
         run: nix develop .#javascript -c ./payjoin-ffi/javascript/contrib/test.sh
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index dc15d86ec..187ea365b 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -29,5 +29,7 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: "Use nix cache"
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: "Build and test"
         run: nix develop .#python --command bash ./payjoin-ffi/python/contrib/test.sh
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index e6fbe5f8f..3cd50ce6d 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -31,6 +31,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: "Use nix cache"
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: "Add nginxWithStream to PATH"
         run: |
           # This is necessary for payjoin-mailroom integration tests
@@ -51,6 +53,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: "Use nix cache"
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: "Run code linting"
         run: nix develop -c ./contrib/lint.sh
       - name: "Run documentation linting"
@@ -77,6 +81,8 @@ jobs:
         uses: DeterminateSystems/determinate-nix-action@main
       - name: "Use nix cache"
         uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
       - name: "Add nginxWithStream to PATH"
         run: |
           # This is necessary for payjoin-mailroom integration tests