diff --git a/.github/workflows/automate-update.yml b/.github/workflows/automate-update.yml
index 710c2fc4..c7b92cea 100644
--- a/.github/workflows/automate-update.yml
+++ b/.github/workflows/automate-update.yml
@@ -18,11 +18,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v22
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-          extra_nix_config: |
-            keep-going = true
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/nix-installer-action@v4
       - name: Update flake inputs
         run: |
           nix flake update --commit-lock-file \
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 94b59196..d921317e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,13 +9,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v22
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-          extra_nix_config: |
-            keep-going = true
-      - run: |
-          sudo apt clean
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/nix-installer-action@v4
       - name: Prepare push to binary cache
         uses: cachix/cachix-action@v12
         if: ${{ github.ref == 'refs/heads/master' }}
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index c6d794b7..51964ec1 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -9,11 +9,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v22
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-          extra_nix_config: |
-            keep-going = true
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/nix-installer-action@v4
       - name: Check flake outputs
         run: nix flake check --impure
 
diff --git a/.github/workflows/iso.yml b/.github/workflows/iso.yml
index 4acfcb24..81988deb 100644
--- a/.github/workflows/iso.yml
+++ b/.github/workflows/iso.yml
@@ -9,9 +9,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v20
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/nix-installer-action@v4
       - name: Build ISO
         id: build-iso
         # TODO: Use the registry.
diff --git a/.github/workflows/site.yml b/.github/workflows/site.yml
index dfa12038..8d439a95 100644
--- a/.github/workflows/site.yml
+++ b/.github/workflows/site.yml
@@ -10,9 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v22
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/nix-installer-action@v4
       - env:
           NIXPKGS_ALLOW_UNFREE: "1"
         run: nix develop .#docs --impure -c hugo -s ./docs/
diff --git a/.github/workflows/update-firefox-addons.yml b/.github/workflows/update-firefox-addons.yml
index d05a9695..4fe9729c 100644
--- a/.github/workflows/update-firefox-addons.yml
+++ b/.github/workflows/update-firefox-addons.yml
@@ -9,7 +9,7 @@ on:
     paths:
       - 'pkgs/firefox-addons'
 jobs:
-  build:
+  update-firefox-addons:
     runs-on: ubuntu-latest
     permissions:
       content: write
@@ -18,9 +18,8 @@ jobs:
         id: metadata
         run: echo "DATE=$(date +%F)" >> "$GITHUB_OUTPUT"
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v22
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/nix-installer-action@v4
       - env:
           NIXPKGS_ALLOW_UNFREE: "1"
         run: nix develop --impure -c mozilla-addons-to-nix pkgs/firefox-addons/firefox-addons.json pkgs/firefox-addons/default.nix