https://github.com/danielaparker/jsoncons/pull/629

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,8 +51,7 @@ install(DIRECTORY ${JSONCONS_INCLUDE_DIR}/jsoncons
                   ${JSONCONS_INCLUDE_DIR}/jsoncons_ext
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
-# GNUInstallDirs "DATADIR" wrong here; CMake search path wants "share".
-set(JSONCONS_CMAKECONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" CACHE STRING "install path for jsonconsConfig.cmake")
+set(JSONCONS_CMAKECONFIG_INSTALL_DIR "${CMAKE_INSTALL_DATADIR}/cmake/${PROJECT_NAME}" CACHE STRING "install path for jsonconsConfig.cmake")
 
 configure_package_config_file(cmake/Config.cmake
                               "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"