diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0bf53567c..7f0e8e511 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -25,7 +25,7 @@ jobs:
     - run: nix-build -A checks.$(nix-instantiate --eval -E '(builtins.currentSystem)')
     - run: |
         NIX_BUILD=$(nix-build -A defaultPackage.$(nix-instantiate --eval -E '(builtins.currentSystem)'))/bin/nix-build
-        $NIX_BUILD --option experimental-features 'flakes' --impure --expr 'builtins.getFlake (builtins.toPath ./.).lib.testAgainst.x86_64-linux (builtins.getFlake (builtins.toPath ./.)).defaultPackage.x86_64-linux'
+        $NIX_BUILD --option experimental-features 'flakes' --impure --expr '(builtins.getFlake (builtins.toPath ./.)).lib.testAgainst.x86_64-linux (builtins.getFlake (builtins.toPath ./.)).defaultPackage.x86_64-linux'
   check_cachix:
     name: Cachix secret present for installer tests
     runs-on: ubuntu-latest