diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 04df496..10b527b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -88,8 +88,10 @@ jobs:
           echo WASI_SDK_CI_TOOLCHAIN_CMAKE_ARGS="$cmake_args" >> $GITHUB_ENV
         shell: bash
       - run: echo WASI_SDK_CI_SKIP_SYSROOT=1 >> $GITHUB_ENV
+        shell: bash
         if: matrix.skip_sysroot != ''
       - run: echo WASI_SDK_CI_SKIP_TESTS=1 >> $GITHUB_ENV
+        shell: bash
         if: matrix.skip_tests != ''
 
       # Add some extra installed software on each runner as necessary.