diff --git a/library/compiler-builtins/.github/workflows/main.yml b/library/compiler-builtins/.github/workflows/main.yml
index f9fb844a98e8..92ce9ca21743 100644
--- a/library/compiler-builtins/.github/workflows/main.yml
+++ b/library/compiler-builtins/.github/workflows/main.yml
@@ -108,6 +108,7 @@ jobs:
     - name: Install Rust (rustup)
       run: rustup update ${{ matrix.rust }} --no-self-update && rustup default ${{ matrix.rust }}
       if: matrix.os != 'macos-latest'
+      shell: bash
     - name: Install Rust (macos)
       run: |
         curl https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly