diff --git a/.github/workflows/nix-build.yml b/.github/workflows/nix-build.yml
index 3029a28..50f5101 100644
--- a/.github/workflows/nix-build.yml
+++ b/.github/workflows/nix-build.yml
@@ -7,5 +7,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: DeterminateSystems/nix-installer-action@v20
+    - uses: DeterminateSystems/nix-installer-action@v21
     - run: nix flake check -Lv