opencv/2.4.13.7: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-2743/.conan/data/opencv/2.4.13.7/_/_/build/f011f771c10b3f271a1784e2c6d47be508d916e9 opencv/2.4.13.7: ERROR: Package 'f011f771c10b3f271a1784e2c6d47be508d916e9' build failed opencv/2.4.13.7: WARN: Build folder /home/conan/w/cci_PR-2743/.conan/data/opencv/2.4.13.7/_/_/build/f011f771c10b3f271a1784e2c6d47be508d916e9 ERROR: opencv/2.4.13.7: Error in build() method, line 147 cmake.build() ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-2743/.conan/data/opencv/2.4.13.7/_/_/build/f011f771c10b3f271a1784e2c6d47be508d916e9/build_subfolder' '--' '-j3'