This was causing an issue for helper usage on linux, see #379. This patch was confirmed to fix it.
@@ -15,6 +15,7 @@ add_executable(${HELPER_TARGET} WIN32
target_link_libraries(${HELPER_TARGET} ${Qt5Core_LIBRARIES} ${Qt5Network_LIBRARIES} qslog shared)
std_target_properties(${HELPER_TARGET})
set_target_properties(${HELPER_TARGET} PROPERTIES
+ INSTALL_RPATH "${QTROOT}/lib"
OUTPUT_NAME ${HELPER_NAME}
)