diff --git a/CMakeLists.txt b/CMakeLists.txt
index bcf29eb7..2997ca42 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,6 +13,13 @@ message(STATUS "generic CMP client version " ${GENCMPCLIENT_VERSION})
 # set(CMAKE_VERBOSE_MAKEFILE ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON) # needed for sonarCloud scanner
 
+#if(UNIX AND NOT APPLE)
+  set(CMAKE_INSTALL_PREFIX "/usr")
+#else()
+#  set(CMAKE_INSTALL_PREFIX "tmp")
+#endif()
+include(GNUInstallDirs) # CMAKE_INSTALL_PREFIX must be set before
+
 # https://cmake.org/cmake/help/v3.6/module/FindOpenSSL.html
 if(NOT "$ENV{OPENSSL_DIR}" STREQUAL "")
   set(OPENSSL_ROOT_DIR $ENV{OPENSSL_DIR})
@@ -62,10 +69,10 @@ if(CMAKE_SYSTEM_NAME MATCHES "Linux")
   # help CPackDeb please dpkg-shlibdeps
   if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.20.0")
     set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS_PRIVATE_DIRS
-        "../lib/${CMAKE_INSTALL_FULL_LIBDIR}")
+        tmp${CMAKE_INSTALL_FULL_LIBDIR} "../lib/${CMAKE_INSTALL_LIBDIR}")
   else()
     set(CMAKE_INSTALL_RPATH # must be done before add_executable()
-        "../lib/${CMAKE_INSTALL_FULL_LIBDIR}")
+        tmp/{CMAKE_INSTALL_FULL_LIBDIR} "../lib/${CMAKE_INSTALL_LIBDIR}")
   endif()
 endif()
 
@@ -186,15 +193,9 @@ endif()
 
 # installation and uninstall
 
-#if(CMAKE_SYSTEM_NAME MATCHES "Linux" OR (UNIX AND NOT APPLE))
-  set(CMAKE_INSTALL_PREFIX "/usr")
-#else()
-#  set(CMAKE_INSTALL_PREFIX "tmp")
-#endif()
 if(DEFINED ENV{ROOTFS})
   set(CMAKE_INSTALL_PREFIX $ENV{ROOTFS} CACHE PATH "comment" FORCE)
 endif()
-include(GNUInstallDirs) # CMAKE_INSTALL_PREFIX must be set before
 
 install(FILES doc/Generic_CMP_client_API.pdf
   DESTINATION ${CMAKE_INSTALL_DOCDIR}-dev