diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 16f0a27..4c3d146 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,7 +30,7 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v19
+    - uses: cachix/install-nix-action@v20
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
     - uses: cachix/cachix-action@v12