diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 85201d06..29df9acf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: DeterminateSystems/magic-nix-cache-action@v2
-      - uses: DeterminateSystems/nix-installer-action@v5
+      - uses: DeterminateSystems/nix-installer-action@v6
         with:
           extra-conf: |
             keep-going = true
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index a749947e..0e02e6a1 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v5
+      - uses: DeterminateSystems/nix-installer-action@v6
       - name: Check flake lockfile
         uses: DeterminateSystems/flake-checker-action@v5
       - name: Check flake outputs
diff --git a/.github/workflows/iso.yml b/.github/workflows/iso.yml
index 56feea2a..d26e4ce8 100644
--- a/.github/workflows/iso.yml
+++ b/.github/workflows/iso.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: DeterminateSystems/magic-nix-cache-action@v2
-      - uses: DeterminateSystems/nix-installer-action@v5
+      - uses: DeterminateSystems/nix-installer-action@v6
       - name: Build ISO
         run: |
           nix build .#images.${{ matrix.arch }}.bootstrap --impure --out-link build-iso-result
diff --git a/.github/workflows/site.yml b/.github/workflows/site.yml
index 311e011b..3d88dcf9 100644
--- a/.github/workflows/site.yml
+++ b/.github/workflows/site.yml
@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: DeterminateSystems/magic-nix-cache-action@v2
-      - uses: DeterminateSystems/nix-installer-action@v5
+      - uses: DeterminateSystems/nix-installer-action@v6
       - env:
           NIXPKGS_ALLOW_UNFREE: "1"
         run: nix develop .#docs --impure -c hugo -s ./docs/
diff --git a/.github/workflows/update-firefox-addons.yml b/.github/workflows/update-firefox-addons.yml
index 68b77466..fed83fe1 100644
--- a/.github/workflows/update-firefox-addons.yml
+++ b/.github/workflows/update-firefox-addons.yml
@@ -18,7 +18,7 @@ jobs:
         id: metadata
         run: echo "DATE=$(date +%F)" >> "$GITHUB_OUTPUT"
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v5
+      - uses: DeterminateSystems/nix-installer-action@v6
       - 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
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index ee960cfc..374fa955 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -14,7 +14,7 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v5
+      - uses: DeterminateSystems/nix-installer-action@v6
       - name: Update flake inputs
         run: |
           nix flake update --commit-lock-file --commit-lockfile-summary "flake.lock: update inputs"