diff -urN mythtv-0.18.1-orig/settings.pro mythtv-0.18.1/settings.pro
--- mythtv-0.18.1-orig/settings.pro	2005-10-22 15:32:48.000000000 +0200
+++ mythtv-0.18.1/settings.pro	2005-10-22 15:35:01.000000000 +0200
@@ -1,5 +1,6 @@
 CONFIG += $$CCONFIG
 
+PREFIX = $$(out)
 isEmpty( PREFIX ) {
     PREFIX = /usr/local
 }