diff --git a/CMakeLists.txt b/CMakeLists.txt
index 95596961..d858e2f9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,16 +51,16 @@ else()
     set( SYSTEM_LIBDIR "lib${LIB_SUFFIX}" )
 endif()
 
-set( QT_INSTALL_PREFIX       "${CMAKE_INSTALL_PREFIX}"                                          CACHE STRING "install path"           )
-set( QT_INSTALL_BINS         "${CMAKE_INSTALL_PREFIX}/bin"                                      CACHE STRING "executables path (bin)" )
-set( QT_INSTALL_LIBS         "${CMAKE_INSTALL_PREFIX}/${SYSTEM_LIBDIR}"                         CACHE STRING "libraries path (lib)"   )
-set( QT_INSTALL_PLUGINS      "${CMAKE_INSTALL_PREFIX}/${SYSTEM_LIBDIR}/${PROJECT_NAME}/plugins" CACHE STRING "plugins path"           )
-set( QT_INSTALL_HEADERS      "${CMAKE_INSTALL_PREFIX}/include/${PROJECT_NAME}"                  CACHE STRING "headers path"           )
-set( QT_INSTALL_SHARE        "${CMAKE_INSTALL_PREFIX}/share"                                    CACHE STRING "data root path"         )
-set( QT_INSTALL_DATA         "${CMAKE_INSTALL_PREFIX}/share/${PROJECT_NAME}"                    CACHE STRING "data path"              )
-set( QT_INSTALL_DOCS         "${CMAKE_INSTALL_PREFIX}/share/${PROJECT_NAME}/doc"                CACHE STRING "documentation path"     )
-set( QT_INSTALL_TRANSLATIONS "${CMAKE_INSTALL_PREFIX}/share/${PROJECT_NAME}/translations"       CACHE STRING "translations path"      )
-set( QT_INSTALL_SYSCONF      "/etc/${PROJECT_NAME}"                                             CACHE STRING "config path"            )
+set( QT_INSTALL_PREFIX       "${CMAKE_INSTALL_PREFIX}"                      CACHE PATH "install path"           )
+set( QT_INSTALL_BINS         "${QT_INSTALL_PREFIX}/bin"                     CACHE PATH "executables path (bin)" )
+set( QT_INSTALL_LIBS         "${QT_INSTALL_PREFIX}/${SYSTEM_LIBDIR}"        CACHE PATH "libraries path (lib)"   )
+set( QT_INSTALL_PLUGINS      "${QT_INSTALL_LIBS}/${PROJECT_NAME}/plugins"   CACHE PATH "plugins path"           )
+set( QT_INSTALL_HEADERS      "${QT_INSTALL_PREFIX}/include/${PROJECT_NAME}" CACHE PATH "headers path"           )
+set( QT_INSTALL_SHARE        "${QT_INSTALL_PREFIX}/share"                   CACHE PATH "data root path"         )
+set( QT_INSTALL_DATA         "${QT_INSTALL_SHARE}/${PROJECT_NAME}"          CACHE PATH "data path"              )
+set( QT_INSTALL_DOCS         "${QT_INSTALL_DATA}/doc"                       CACHE PATH "documentation path"     )
+set( QT_INSTALL_TRANSLATIONS "${QT_INSTALL_DATA}/translations"              CACHE PATH "translations path"      )
+set( QT_INSTALL_SYSCONF      "/etc/${PROJECT_NAME}"                         CACHE PATH "config path"            )
 
 
 ##### optional stuff