Run yarn twice on CI

.circleci/config.yml

@@ -10,8 +10,6 @@ jobs:
     steps:
       - checkout
       - run: echo 'export PATH=$HOME/CIRCLE_PROJECT_REPONAME/node_modules/.bin:$PATH' >> $BASH_ENV
-      - run: yarn --version
-      - run: which yarn
       - restore_cache:
           name: Restore Yarn Package Cache
           keys:
@@ -22,6 +20,9 @@ jobs:
       - run:
           name: yarn
           command: yarn --frozen-lockfile install
+      - run:
+          name: yarn
+          command: yarn --frozen-lockfile install
       - save_cache:
           name: Save Yarn Package Cache
           key: yarn-packages-{{ .Branch }}-{{ checksum "yarn.lock" }}