Index: qwt-6.1.4/qwtconfig.pri
===================================================================
--- qwt-6.1.4.orig/qwtconfig.pri
+++ qwt-6.1.4/qwtconfig.pri
@@ -19,8 +19,7 @@ QWT_VERSION      = $${QWT_VER_MAJ}.$${QW
 QWT_INSTALL_PREFIX = $$[QT_INSTALL_PREFIX]
 
 unix {
-    QWT_INSTALL_PREFIX    = /usr/local/qwt-$$QWT_VERSION
-    # QWT_INSTALL_PREFIX = /usr/local/qwt-$$QWT_VERSION-qt-$$QT_VERSION
+    QWT_INSTALL_PREFIX = $$[QT_INSTALL_PREFIX]
 }
 
 win32 {
@@ -28,9 +27,9 @@ win32 {
     # QWT_INSTALL_PREFIX = C:/Qwt-$$QWT_VERSION-qt-$$QT_VERSION
 }
 
-QWT_INSTALL_DOCS      = $${QWT_INSTALL_PREFIX}/doc
-QWT_INSTALL_HEADERS   = $${QWT_INSTALL_PREFIX}/include
-QWT_INSTALL_LIBS      = $${QWT_INSTALL_PREFIX}/lib
+QWT_INSTALL_DOCS      = $$[QT_INSTALL_DOCS]/qwt6
+QWT_INSTALL_HEADERS   = $$[QT_INSTALL_HEADERS]/qwt6
+QWT_INSTALL_LIBS      = $$[QT_INSTALL_LIBS]
 
 ######################################################################
 # Designer plugin
@@ -41,15 +40,13 @@ QWT_INSTALL_LIBS      = $${QWT_INSTALL_P
 # add $${QWT_INSTALL_PREFIX}/plugins to QT_PLUGIN_PATH in the
 # runtime environment of designer/creator.
 ######################################################################
-
-QWT_INSTALL_PLUGINS   = $${QWT_INSTALL_PREFIX}/plugins/designer
-
 # linux distributors often organize the Qt installation
 # their way and QT_INSTALL_PREFIX doesn't offer a good
 # path. Also QT_INSTALL_PREFIX is only one of the default
 # search paths of the designer - not the Qt creator
+######################################################################
 
-#QWT_INSTALL_PLUGINS   = $$[QT_INSTALL_PREFIX]/plugins/designer
+QWT_INSTALL_PLUGINS   = $$[QT_INSTALL_PLUGINS]/designer
 
 ######################################################################
 # Features
@@ -63,8 +60,7 @@ QWT_INSTALL_PLUGINS   = $${QWT_INSTALL_P
 # with every Qt upgrade.
 ######################################################################
 
-QWT_INSTALL_FEATURES  = $${QWT_INSTALL_PREFIX}/features
-# QWT_INSTALL_FEATURES  = $$[QT_INSTALL_PREFIX]/features
+QWT_INSTALL_FEATURES  = $$[QMAKE_MKSPECS]/features
 
 ######################################################################
 # Build the static/shared libraries.
@@ -141,7 +137,7 @@ win32 {
 # Otherwise you have to build them from the examples directory.
 ######################################################################
 
-#QWT_CONFIG     += QwtExamples
+QWT_CONFIG     += QwtExamples
 
 ######################################################################
 # The playground is primarily intended for the Qwt development
@@ -171,5 +167,5 @@ macx:!static:CONFIG(qt_framework, qt_fra
 
 unix {
 
-    #QWT_CONFIG     += QwtPkgConfig
+    QWT_CONFIG     += QwtPkgConfig
 }