diff --git a/.github/workflows/build-iso.yml b/.github/workflows/build-iso.yml
index 86fe989de..26cbf4a50 100644
--- a/.github/workflows/build-iso.yml
+++ b/.github/workflows/build-iso.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
-    - uses: DeterminateSystems/nix-installer-action@v8
+    - uses: DeterminateSystems/nix-installer-action@v9
     - uses: DeterminateSystems/magic-nix-cache-action@v2
     - name: Build Console ISO
       run: |
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
-    - uses: DeterminateSystems/nix-installer-action@v8
+    - uses: DeterminateSystems/nix-installer-action@v9
     - uses: DeterminateSystems/magic-nix-cache-action@v2
     - name: Build Desktop ISO
       run: |
diff --git a/.github/workflows/deadnix.yml b/.github/workflows/deadnix.yml
index 7bf20286d..7fca03a78 100644
--- a/.github/workflows/deadnix.yml
+++ b/.github/workflows/deadnix.yml
@@ -11,6 +11,6 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v8
+      - uses: DeterminateSystems/nix-installer-action@v9
       - uses: DeterminateSystems/magic-nix-cache-action@v2
       - uses: astro/deadnix-action@v1
diff --git a/.github/workflows/flake-checker.yml b/.github/workflows/flake-checker.yml
index 83eff000b..fab546e55 100644
--- a/.github/workflows/flake-checker.yml
+++ b/.github/workflows/flake-checker.yml
@@ -17,6 +17,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: DeterminateSystems/nix-installer-action@v8
+      - uses: DeterminateSystems/nix-installer-action@v9
       - uses: DeterminateSystems/magic-nix-cache-action@v2
       - uses: DeterminateSystems/flake-checker-action@v5
diff --git a/.github/workflows/lock-updater.yml b/.github/workflows/lock-updater.yml
index 86f551863..a74e55c88 100644
--- a/.github/workflows/lock-updater.yml
+++ b/.github/workflows/lock-updater.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: DeterminateSystems/nix-installer-action@v8
+      - uses: DeterminateSystems/nix-installer-action@v9
       - uses: DeterminateSystems/magic-nix-cache-action@v2
       - uses: DeterminateSystems/update-flake-lock@v20
         with: