Throwaway: set paths in a step, since job env can't read the runner context

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: nedtwigg

.github/workflows/rendering-check-cft.yml

@@ -20,14 +20,17 @@ jobs:
           - { machine: arm-b, runner: ubuntu-24.04-arm, scope: core, repeats: 1 }
           - { machine: x64-a, runner: ubuntu-latest, scope: full, repeats: 2 }
           - { machine: x64-b, runner: ubuntu-latest, scope: core, repeats: 1 }
-    env:
-      TOOLING: ${{ github.workspace }}/rendering-check-cft/tooling
-      BUILD: ${{ runner.temp }}/build/storybook-static
-      SAMPLE: ${{ github.workspace }}/rendering-check-cft/sample.json
-      CFT_DIR: ${{ runner.temp }}/cft
-      PW_BROWSERS: ${{ runner.temp }}/pw
-      OUT_ROOT: ${{ runner.temp }}/out/${{ matrix.machine }}
     steps:
+      - name: Set paths
+        run: |
+          {
+            echo "TOOLING=$GITHUB_WORKSPACE/rendering-check-cft/tooling"
+            echo "BUILD=$RUNNER_TEMP/build/storybook-static"
+            echo "SAMPLE=$GITHUB_WORKSPACE/rendering-check-cft/sample.json"
+            echo "CFT_DIR=$RUNNER_TEMP/cft"
+            echo "PW_BROWSERS=$RUNNER_TEMP/pw"
+            echo "OUT_ROOT=$RUNNER_TEMP/out/${{ matrix.machine }}"
+          } >> "$GITHUB_ENV"
       - uses: actions/checkout@v4
         with:
           persist-credentials: false