--- a/QTfrontend/net/hwmap.cpp	Fri Feb 28 14:03:21 2014 +0400
+++ b/QTfrontend/net/hwmap.cpp	Sat Mar 01 13:41:19 2014 -0500
@@ -57,6 +57,8 @@
     arguments << QString("%1").arg(ipc_port);
     arguments << "--user-prefix";
     arguments << cfgdir->absolutePath();
+    arguments << "--prefix";
+    arguments << datadir->absolutePath();
     arguments << "--landpreview";
     return arguments;
 }