Fix circleci

Author: Mauko Quiroga

.circleci/config.yml

@@ -26,7 +26,7 @@ jobs:
       - run:
           name: Install dependencies
           command: |
-            make install-deps
+            make clean install-deps
             # pip install --editable git+https://github.com/openfisca/country-template.git@BRANCH_NAME#egg=OpenFisca-Country-Template  # use a specific branch of OpenFisca-Country-Template
             # pip install --editable git+https://github.com/openfisca/extension-template.git@BRANCH_NAME#egg=OpenFisca-Extension-Template  # use a specific branch of OpenFisca-Extension-Template