CMake Warning at source_subfolder/cmake/OpenCVDetectPython.cmake:81 (message): CMake's 'find_host_package(PythonInterp 2.7)' found wrong Python version: PYTHON_EXECUTABLE=/opt/pyenv/versions/3.7.5/bin/python PYTHON_VERSION_STRING=3.7.5 Consider providing the 'PYTHON2_EXECUTABLE' variable via CMake command line or environment variables Call Stack (most recent call first): source_subfolder/cmake/OpenCVDetectPython.cmake:271 (find_python) source_subfolder/CMakeLists.txt:606 (include) Traceback (most recent call last): File "", line 1, in ModuleNotFoundError: No module named 'numpy' CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY /home/conan/w/cci_PR-3465/1/e4f4986e-a4fa-44dd-a4e3-05cc70634278/recipes/opencv/3.x/test_package/test_package.cpp:18:23: error: no member named 'insert' in 'cv::String' face_cascade_name.insert(0, res_folder); ~~~~~~~~~~~~~~~~~ ^ /home/conan/w/cci_PR-3465/1/e4f4986e-a4fa-44dd-a4e3-05cc70634278/recipes/opencv/3.x/test_package/test_package.cpp:19:23: error: no member named 'insert' in 'cv::String' eyes_cascade_name.insert(0, res_folder); ~~~~~~~~~~~~~~~~~ ^ 2 errors generated. make[2]: *** [CMakeFiles/test_package.dir/test_package.cpp.o] Error 1 make[1]: *** [CMakeFiles/test_package.dir/all] Error 2 make: *** [all] Error 2 ERROR: opencv/3.4.12 (test package): Error in build() method, line 12 cmake.build() ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-3465/1/e4f4986e-a4fa-44dd-a4e3-05cc70634278/recipes/opencv/3.x/test_package/build/ccf6b7fc9145d6d47b829f83d64c4229df6f02f1' '--' '-j3'