This patch comes from Debian
--- platform/gtk-x11/setup.py.orig	2009-02-28 17:29:13.000000000 +0100
+++ platform/gtk-x11/setup.py	2009-02-28 17:29:26.000000000 +0100
@@ -330,7 +330,7 @@
         exit;
     fi
 
-    $GDB -ex 'set breakpoint pending on' -ex 'run' --args $PYTHON ./miro.real --sync "$@"
+    $GDB -ex 'set breakpoint pending on' -ex 'run' --args $PYTHON /usr/bin/miro.real --sync "$@"
 else
     miro.real "$@"
 fi