Gentoo's Bugzilla –
Attachment 579504 Details for
Bug 687810games-simulation/openrct2-0.2.1 : CMake Error at /.../FindPackageHandleStandardArgs.cmake:137 (message): Failed to find all ICU components (missing: ICU_INCLUDE_DIR ICU_LIBRARY _ICU_REQUIRED_LIBS_FOUND) (Required is at least version "59.0")