Move env to where it (hopefully) belongs.

.github/workflows/c-cpp.yml

@@ -120,9 +120,9 @@ jobs:
           - { target: macos-14, config: pam }
           - { target: macos-15, config: pam }
     runs-on: ${{ matrix.target }}
+  - env:
+    EPHEMERAL_VM: yes
     steps:
-    - env:
-      EPHEMERAL_VM: yes
     - name: check RUN_ONLY_TARGET_CONFIG
       if: vars.RUN_ONLY_TARGET_CONFIG != ''
       run: sh -c 'if [ "${{ vars.RUN_ONLY_TARGET_CONFIG }}" != "${{ matrix.target }} ${{matrix.config }}" ]; then exit 1; else exit 0; fi'