diff --git a/qwtconfig.pri b/qwtconfig.pri
index 7adefe2..194846b 100644
--- a/qwtconfig.pri
+++ b/qwtconfig.pri
@@ -19,7 +19,7 @@ QWT_VERSION      = $${QWT_VER_MAJ}.$${QWT_VER_MIN}.$${QWT_VER_PAT}
 QWT_INSTALL_PREFIX = $$[QT_INSTALL_PREFIX]
 
 unix {
-    QWT_INSTALL_PREFIX    = /usr/local/qwt-$$QWT_VERSION
+    QWT_INSTALL_PREFIX    = $EBROOTQWT/$$QWT_VERSION
     # QWT_INSTALL_PREFIX = /usr/local/qwt-$$QWT_VERSION-qt-$$QT_VERSION
 }