cache local files

.gitlab-ci.yml

 cache:
   paths:
-    - venv3/
-    - venv2/
-    - dist3/
-    - dist2/
+    - ./venv3/
+    - ./venv2/
+    - ./dist3/
+    - ./dist2/
 
 stages:
   - build
@@ -17,7 +17,7 @@ build-3.5:
     GIT_SUBMODULE_STRATEGY: recursive
   script:
   - virtualenv --clear -p python3.5 ./venv3
-  - source venv3/bin/activate
+  - source ./venv3/bin/activate
   - python setup.py bdist_wheel --dist-dir dist3
 
 build-2.7:
@@ -28,7 +28,7 @@ build-2.7:
     GIT_SUBMODULE_STRATEGY: recursive
   script:
   - virtualenv --clear -p python2.7 ./venv2
-  - source venv2/bin/activate
+  - source ./venv2/bin/activate
   - python setup.py bdist_wheel --dist-dir dist2
 
 test-3.5:
@@ -36,7 +36,7 @@ test-3.5:
   tags:
     - Linux
   script:
-  - source venv3/bin/activate
+  - source ./venv3/bin/activate
   - pip install dist3/*.whl
   - cd tests
   - python -m unittest discover