diff -Nur assimp-4.1.0/tools/assimp_qt_viewer/CMakeLists.txt new/tools/assimp_qt_viewer/CMakeLists.txt
--- assimp-4.1.0/tools/assimp_qt_viewer/CMakeLists.txt	2017-12-11 14:22:45.000000000 +0100
+++ new/tools/assimp_qt_viewer/CMakeLists.txt	2018-08-11 22:08:44.441867937 +0200
@@ -43,3 +43,7 @@
 endif()
 
 set_property(TARGET ${PROJECT_NAME} PROPERTY DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
+
+install( TARGETS ${PROJECT_NAME}
+  DESTINATION "${ASSIMP_BIN_INSTALL_DIR}" COMPONENT assimp-dev
+)