Fix installation paths.
Index: src/libQtAV.pri
--- src/libQtAV.pri.orig
+++ src/libQtAV.pri
@@ -135,7 +135,7 @@ DEPENDPATH *= $$PROJECT_SRCPATH
 		maemo5 {
 			target.path = /opt/usr/lib
 		} else {
-			target.path = /usr/lib
+			target.path = $$(TRUEPREFIX)/lib
 		}
 		INSTALLS += target
 	}
