/usr/include/qt5qevercloud/ is in qt5qevercloud-dev 3.0.3+ds-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/qt5qevercloud/AsyncResult.h
/usr/include/qt5qevercloud/EventLoopFinisher.h
/usr/include/qt5qevercloud/EverCloudException.h
/usr/include/qt5qevercloud/Optional.h
/usr/include/qt5qevercloud/QEverCloud.h
/usr/include/qt5qevercloud/QEverCloudOAuth.h
/usr/include/qt5qevercloud/exceptions.h
/usr/include/qt5qevercloud/export.h
/usr/include/qt5qevercloud/generated/
/usr/include/qt5qevercloud/generated/EDAMErrorCode.h
/usr/include/qt5qevercloud/generated/constants.h
/usr/include/qt5qevercloud/generated/services.h
/usr/include/qt5qevercloud/generated/types.h
/usr/include/qt5qevercloud/globals.h
/usr/include/qt5qevercloud/oauth.h
/usr/include/qt5qevercloud/qt4helpers.h
/usr/include/qt5qevercloud/thumbnail.h