message: pip install --user
diff: @@ -46,7 +46,7 @@ install:
  - sudo make install
  - cd ..
  - pip3 install --upgrade pip
  - - pip3 install Cython sphinx sphinxcontrib-bibtex matplotlib numpy
  + - pip3 install --user Cython sphinx sphinxcontrib-bibtex matplotlib numpy
  script:
  - mkdir -p build
  - cd build
  