diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a1de56..6c74be7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v9
+      - uses: cachix/install-nix-action@v12
       - name: Check Nix Parsing
         run: |
           find . -name "*.nix" -exec nix-instantiate --parse --quiet {} >/dev/null +
@@ -13,7 +13,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v9
+      - uses: cachix/install-nix-action@v12
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
       - name: Check Nix Formatting
         run: |
           nix run nixpkgs.nixpkgs-fmt -c nixpkgs-fmt --check .