diff --git a/.github/workflows/cachix.yml b/.github/workflows/cachix.yml
index 88768ee9..63a0fd6f 100644
--- a/.github/workflows/cachix.yml
+++ b/.github/workflows/cachix.yml
@@ -25,7 +25,7 @@ jobs:
         name: Checkout
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v31.8.4
+        uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 78671a88..7193caeb 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -18,7 +18,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@v31.8.4
+      - uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
@@ -37,7 +37,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v31.8.4
+        uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
@@ -93,7 +93,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@v31.8.4
+      - uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
@@ -124,7 +124,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@v31.8.4
+      - uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
@@ -162,7 +162,7 @@ jobs:
           cat "$HOME/changed_files"
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v31.8.4
+        uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
diff --git a/.github/workflows/docs-preview.yml b/.github/workflows/docs-preview.yml
index 74fd4b34..10421204 100644
--- a/.github/workflows/docs-preview.yml
+++ b/.github/workflows/docs-preview.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@v31.8.4
+      - uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
diff --git a/.github/workflows/manual.yml b/.github/workflows/manual.yml
index 9a8b690f..1c628b08 100644
--- a/.github/workflows/manual.yml
+++ b/.github/workflows/manual.yml
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@v31.8.4
+      - uses: cachix/install-nix-action@v31.9.0
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |