another try

Author: gonzalocasas

.travis.yml

@@ -33,8 +33,8 @@ matrix:
 
 install:
   - python -m ensurepip
-  - pip install cython --install-option="--no-cython-compile"
-  - pip install --no-cache-dir -r requirements-dev.txt
+  - python -m pip install cython --install-option="--no-cython-compile"
+  - python -m pip install --no-cache-dir -r requirements-dev.txt
 
 script:
   - python -c "import compas_fab"