diff --git a/.github/workflows/build-aarch64-darwin.yml b/.github/workflows/build-aarch64-darwin.yml
index 9ec227c8..b6e85524 100644
--- a/.github/workflows/build-aarch64-darwin.yml
+++ b/.github/workflows/build-aarch64-darwin.yml
@@ -24,10 +24,9 @@ jobs:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-        with:
-          flakehub: true
       - uses: DeterminateSystems/magic-nix-cache-action@main
         with:
+          use-flakehub: false
           use-gha-cache: false
       - name: Build the installer
         run: |
diff --git a/.github/workflows/build-aarch64-linux.yml b/.github/workflows/build-aarch64-linux.yml
index e04ab5f4..43f356c7 100644
--- a/.github/workflows/build-aarch64-linux.yml
+++ b/.github/workflows/build-aarch64-linux.yml
@@ -24,10 +24,9 @@ jobs:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-        with:
-          flakehub: true
       - uses: DeterminateSystems/magic-nix-cache-action@main
         with:
+          use-flakehub: false
           use-gha-cache: false
       - name: Build the installer
         run: |
diff --git a/.github/workflows/build-i686-linux.yml b/.github/workflows/build-i686-linux.yml
index d21aa7fa..bc7e5a6e 100644
--- a/.github/workflows/build-i686-linux.yml
+++ b/.github/workflows/build-i686-linux.yml
@@ -24,10 +24,9 @@ jobs:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-        with:
-          flakehub: true
       - uses: DeterminateSystems/magic-nix-cache-action@main
         with:
+          use-flakehub: false
           use-gha-cache: false
       - name: Build the installer
         run: |
diff --git a/.github/workflows/build-x86_64-darwin.yml b/.github/workflows/build-x86_64-darwin.yml
index cfc3a92a..20911c31 100644
--- a/.github/workflows/build-x86_64-darwin.yml
+++ b/.github/workflows/build-x86_64-darwin.yml
@@ -24,10 +24,9 @@ jobs:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-        with:
-          flakehub: true
       - uses: DeterminateSystems/magic-nix-cache-action@main
         with:
+          use-flakehub: false
           use-gha-cache: false
       - name: Build the installer
         run: |
diff --git a/.github/workflows/build-x86_64-linux.yml b/.github/workflows/build-x86_64-linux.yml
index f2056e47..2a74f043 100644
--- a/.github/workflows/build-x86_64-linux.yml
+++ b/.github/workflows/build-x86_64-linux.yml
@@ -24,10 +24,9 @@ jobs:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-        with:
-          flakehub: true
       - uses: DeterminateSystems/magic-nix-cache-action@main
         with:
+          use-flakehub: false
           use-gha-cache: false
       - name: Build the installer
         run: |
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 69f6ace4..6e20692e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,10 +34,9 @@ jobs:
           check-outdated: false # PRs shouldn't fail because main's nixpkgs is out of date
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-        with:
-          flakehub: true
       - uses: DeterminateSystems/magic-nix-cache-action@main
         with:
+          use-flakehub: false
           use-gha-cache: false
       - name: Check rustfmt
         run: nix develop --command check-rustfmt
@@ -74,7 +73,6 @@ jobs:
       - name: Initial install
         uses: DeterminateSystems/nix-installer-action@main
         with:
-          flakehub: true
           local-root: install-root/
           logger: pretty
           log-directives: nix_installer=debug
@@ -104,7 +102,6 @@ jobs:
       - name: Repeated install
         uses: DeterminateSystems/nix-installer-action@main
         with:
-          flakehub: true
           local-root: install-root/
           logger: pretty
           log-directives: nix_installer=debug
@@ -182,7 +179,6 @@ jobs:
       - name: Initial install
         uses: DeterminateSystems/nix-installer-action@main
         with:
-          flakehub: true
           init: none
           planner: linux
           local-root: install-root/
@@ -216,7 +212,6 @@ jobs:
       - name: Repeated install
         uses: DeterminateSystems/nix-installer-action@main
         with:
-          flakehub: true
           init: none
           planner: linux
           local-root: install-root/
@@ -296,7 +291,6 @@ jobs:
       - name: Initial install
         uses: DeterminateSystems/nix-installer-action@main
         with:
-          flakehub: true
           local-root: install-root/
           logger: pretty
           log-directives: nix_installer=debug
@@ -314,7 +308,6 @@ jobs:
       - name: Repeated install
         uses: DeterminateSystems/nix-installer-action@main
         with:
-          flakehub: true
           local-root: install-root/
           logger: pretty
           log-directives: nix_installer=debug
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 027002ef..0b52e0d0 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -15,11 +15,10 @@ jobs:
         uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-        with:
-          flakehub: true
       - name: Enable Magic Nix Cache
         uses: DeterminateSystems/magic-nix-cache-action@main
         with:
+          use-flakehub: false
           use-gha-cache: false
       - name: Check flake
         uses: DeterminateSystems/flake-checker-action@main