Update config.yml

Author: gkorland

.circleci/config.yml

@@ -25,10 +25,11 @@ jobs:
       - run:
           name: install dependencies
           command: |
-            python -m venv venv
+            mkdir -p ./venv
+            virtualenv ./venv
             . venv/bin/activate
             pip install -r requirements.txt
-
+            
       - save_cache:
           paths:
             - ./venv