diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index cef276d5b..8f6d0cf75 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -7,7 +7,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Setup Nix
-        uses: cachix/install-nix-action@v25
+        uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13
diff --git a/.github/workflows/release-tip.yml b/.github/workflows/release-tip.yml
index 1dbf1a486..4553dde90 100644
--- a/.github/workflows/release-tip.yml
+++ b/.github/workflows/release-tip.yml
@@ -45,7 +45,7 @@ jobs:
           fetch-depth: 0
 
       # Install Nix and use that to run our tests so our environment matches exactly.
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3194d76e7..75dc9a04c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -28,7 +28,7 @@ jobs:
         uses: actions/checkout@v4
 
       # Install Nix and use that to run our tests so our environment matches exactly.
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13
@@ -49,7 +49,7 @@ jobs:
         uses: actions/checkout@v4
 
       # Install Nix and use that to run our tests so our environment matches exactly.
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13
@@ -71,7 +71,7 @@ jobs:
         uses: actions/checkout@v4
 
       # Install Nix and use that to run our tests so our environment matches exactly.
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13
@@ -165,7 +165,7 @@ jobs:
         uses: actions/checkout@v4
 
       # Install Nix and use that to run our tests so our environment matches exactly.
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13
@@ -189,7 +189,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4 # Check out repo so we can lint it
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13
@@ -203,7 +203,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4 # Check out repo so we can lint it
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v13