diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a875d0c8..b8a348a6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -192,8 +192,8 @@ jobs:
           python-version: "3.12"
       - name: "Set environment variables"
         run: |
-          RUNNER_NUM=$(hostname | grep -o '[0-9][0-9]' | sed 's/^0*//')
-          echo PYTEST_DEBUG_TEMPROOT=/var/lib/github/ghrunner_${RUNNER_NUM}/_temp >> $GITHUB_ENV
+          RUNNER_NAME=$(echo "${{ runner.name }}" | grep -o 'ghrunner[0-9]\+' | sed 's/ghrunner\([0-9]\+\)/ghrunner_\1/')
+          echo "PYTEST_DEBUG_TEMPROOT=/var/lib/github/${RUNNER_NAME}/_temp" >> $GITHUB_ENV
       - name: "Setup environment"
         run: |
           pipx install poetry==1.8.5