diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 36fad43..f687319 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,7 +54,7 @@ jobs:
       - name: Install Dependencies
         # Absurdly, yarn always fails on the first try here.
         # https://github.com/yarnpkg/yarn/issues/2629
-        run: until yarn install --no-lockfile; do echo "Retrying yarn"; done
+        run: until yarn install --immutable --immutable-cache --check-cache; do echo "Retrying yarn"; done
 
       - name: Run Tests
         run: yarn test:ember