diff --git a/.circleci/config.yml b/.circleci/config.yml
index f8d0b06d..7ea23dac 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -136,6 +136,8 @@ jobs:
           pip install certifi
           export RELEASE_NOTES_TOKEN=$REPO_GITHUB_TOKEN
           bazel run @graknlabs_build_tools//ci:release-notes -- client-python $(cat VERSION) ./RELEASE_TEMPLATE.md
+      - run: pyenv global 2.7.12 3.5.2
+      - run: bazel clean --expunge
       - run: |
           export DEPLOY_GITHUB_TOKEN=$REPO_GITHUB_TOKEN
           bazel run --define version=$(cat VERSION) //:deploy-github -- $CIRCLE_SHA1