diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dde4202b1..b765a0d20 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,6 +24,7 @@ jobs:
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
     - run: nix-build -A checks.$(nix-instantiate --eval -E '(builtins.currentSystem)')
     - run: |
+        cachix use nixos-nix-install-tests
         NIX_BUILD=$(nix-build -A defaultPackage.$(nix-instantiate --eval -E '(builtins.currentSystem)'))/bin/nix-build
         $NIX_BUILD \
           --option experimental-features 'flakes' \