cmake: Try to fix problems with installation on other platforms.
diff --git a/cmake/Modules/DefineInstallationPaths.cmake b/cmake/Modules/DefineInstallationPaths.cmake
index 71e1e85..14507ed 100644
--- a/cmake/Modules/DefineInstallationPaths.cmake
+++ b/cmake/Modules/DefineInstallationPaths.cmake
@@ -90,18 +90,14 @@
     "${SHARE_INSTALL_PREFIX}/info"
     CACHE PATH "The ${APPLICATION_NAME} info install dir (default prefix/info)"
   )
-endif (UNIX)
-
-if (WIN32)
-  # Same same
+else()
   set(BIN_INSTALL_DIR "bin" CACHE PATH "-")
   set(SBIN_INSTALL_DIR "." CACHE PATH "-")
-  set(LIB_INSTALL_DIR "lib" CACHE PATH "-")
+  set(LIB_INSTALL_DIR "lib${LIB_SUFFIX}" CACHE PATH "-")
   set(INCLUDE_INSTALL_DIR "include" CACHE PATH "-")
   set(PLUGIN_INSTALL_DIR "plugins" CACHE PATH "-")
   set(HTML_INSTALL_DIR "doc/HTML" CACHE PATH "-")
   set(ICON_INSTALL_DIR "." CACHE PATH "-")
   set(SOUND_INSTALL_DIR "." CACHE PATH "-")
   set(LOCALE_INSTALL_DIR "lang" CACHE PATH "-")
-endif (WIN32)
-
+endif ()