diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 07743f918..0bf1b6b08 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -78,7 +78,7 @@ jobs:
             .sources
           key: fonts-${{ hashFiles('Makefile-fonts') }}
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v5
+        uses: DeterminateSystems/nix-installer-action@v6
       - name: Cache Nix dependencies
         uses: DeterminateSystems/magic-nix-cache-action@v2
       - name: Setup developer environment
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index bd067ce30..20befbf78 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -16,7 +16,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v5
+        uses: DeterminateSystems/nix-installer-action@v6
       - name: Cache Nix dependencies
         uses: DeterminateSystems/magic-nix-cache-action@v2
       # Upstream package sometimes has flags set that disable flake checking