diff --git a/etc/ci/buildbot_steps.yml b/etc/ci/buildbot_steps.yml
index 945311cfbd3..7d9a7cfd3d1 100644
--- a/etc/ci/buildbot_steps.yml
+++ b/etc/ci/buildbot_steps.yml
@@ -147,6 +147,7 @@ linux-nightly:
   - ./mach test-perf
   - python3 ./etc/ci/performance/download_buildbot_timings.py --verbose
   - aws s3 sync --size-only --acl public-read ./etc/ci/performance/output s3://servo-perf
+  - rm -rf ./python/_virtualenv
   - ./etc/ci/update-wpt-checkout fetch-and-update-expectations
   - ./etc/ci/update-wpt-checkout open-pr
   - ./etc/ci/update-wpt-checkout cleanup