message: unzip is not needed for ci run
diff: @@ -16,7 +16,6 @@ dist: xenial
  addons:
  apt:
  packages:
  - - unzip
  - build-essential
  - cmake
  - libgtk2.0-dev
  @@ -45,7 +44,7 @@ env:
  - Atlas_ROOT_DIR=/usr/include/ # for cmake to find lapacke.h
  before_script:
  - - mkdir ~/build/opencv ; true
  + - mkdir -p ~/build/opencv
  - wget -O- https://github.com/opencv/opencv/archive/$OPENCV_VERSION.tar.gz | tar -xzC ~/build/opencv
  - wget -O- https://github.com/opencv/opencv_contrib/archive/$OPENCV_VERSION.tar.gz | tar -xzC ~/build/opencv
  - mkdir -p ~/build/opencv/opencv-$OPENCV_VERSION-build
  