diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cd59e7c9..46f13c20 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,10 +16,11 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v22
+      - uses: DeterminateSystems/nix-installer-action@v7
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
 
-        # Evaluate the devshell here so that the time reported for subsequent
-        # steps that use it reflect what is actually done there.
+      # Evaluate the devshell here so that the time reported for subsequent
+      # steps that use it reflect what is actually done there.
       - name: Evaluate devshell
         run: nix develop
 
@@ -62,7 +63,13 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v22
+      - uses: DeterminateSystems/nix-installer-action@v7
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
+
+      # Evaluate the devshell here so that the time reported for subsequent
+      # steps that use it reflect what is actually done there.
+      - name: Evaluate devshell
+        run: nix develop
 
       - name: Build
         run: nix build -L .#${{ matrix.package }}