diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index f87147b..198a749 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -46,7 +46,7 @@ jobs:
     env:
       PROJECT_NAME_UNDERSCORE: masto_thread_renderer
       CARGO_INCREMENTAL: 0
-      RUSTFLAGS: -Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests
+      RUSTFLAGS: -Zunstable-options -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
     runs-on: ubuntu-latest
     steps: