A question about svn-buildpackage

[Qijiang Fan <fqj1994@gmail.com>]

I'm new in Debian.And i met a problem on svn-buildpackage

$ls

schacon-hg-git-0ed3c70  tarballs

$ls tarballs/

hg-git_0.2.5.orig.tar.gz

$cd schacon-hg-git-0ed3c70/

$svn-buildpackage -rfakeroot

Complete layout information:

trunkDir=/tmp/xx/schacon-hg-git-0ed3c70

trunkUrl=svn+ssh://fqj1994-guest@svn.debian.org/svn/python-apps/packages/hg-git/trunk

dpkg-checkbuilddeps

mergeWithUpstream mode detected, looking for ../tarballs/hg-git_0.2.5.orig.tar.gz

I: mergeWithUpstream property set, looking for upstream source tarball...

E: Could not find the origDir directory, please check the settings! at /usr/bin/svn-buildpackage line 595.

Is there anyone who can tell me how to solve this problem