diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7ebaf12..19f4194 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
           # Nix Flakes doesn't work on shallow clones
           fetch-depth: 0
     - name: Install Nix
-      uses: DeterminateSystems/nix-installer-action@v8
+      uses: DeterminateSystems/nix-installer-action@v9
     - uses: DeterminateSystems/magic-nix-cache-action@main
     - run: nix-build
   test: