diff --git a/.github/workflows/prototyping.yml b/.github/workflows/prototyping.yml
index 3b24cb12..891bbb4b 100644
--- a/.github/workflows/prototyping.yml
+++ b/.github/workflows/prototyping.yml
@@ -62,7 +62,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake ../
+        cmake build ../
     - name: cmake build luau-ast
       working-directory: build
       run: |