--- qwt-6.0.2/qwtbuild.pri.orig     2013-01-11 04:23:05.001149320 +0100
+++ qwt-6.0.2/qwtbuild.pri      2013-01-11 04:23:15.355436864 +0100
@@ -64,17 +64,3 @@
 !debug_and_release {
     OBJECTS_DIR       = obj
 }
-
-unix {
-
-    exists( $${QMAKE_LIBDIR_QT}/libqwt.so ) {
-
-        # On some Linux distributions the Qwt libraries are installed 
-        # in the same directory as the Qt libraries. Unfortunately
-        # qmake always adds QMAKE_LIBDIR_QT at the beginning of the 
-        # linker path, so that the installed libraries will be
-        # used instead of the local ones.
-
-        error( "local build will conflict with $${QMAKE_LIBDIR_QT}/libqwt.*" )
-    }
-}