try cacheing pyenv versions.

Author: theengineear

circle.yml

@@ -2,7 +2,6 @@ machine:
   environment:
     PLOTLY_PACKAGE_ROOT: /home/ubuntu/python-api
     PLOTLY_CONFIG_DIR: ${HOME}/.plotly
-    PLOTLY_VENV_DIR: ${HOME}/venvs
     PLOTLY_PYTHON_VERSIONS: 2.6.8 2.7.8 3.3.3
     PLOTLY_CORE_REQUIREMENTS_FILE: ${PLOTLY_PACKAGE_ROOT}/requirements.txt
     PLOTLY_OPTIONAL_REQUIREMENTS_FILE: ${PLOTLY_PACKAGE_ROOT}/optional-requirements.txt
@@ -18,7 +17,7 @@ dependencies:
     - cd ~ && python -c "import plotly"
   cache_directories:
     # things we don't want to have to do again...
-    - ${PLOTLY_VENV_DIR}
+    - ${HOME}/.pyenv/versions
 test:
   override: