Unity 2d bzr install problem

$ sudo packer -S unity2d-bzr

Aur Targets    (1): unity2d-bzr

Proceed with installation? [Y/n] y
Edit unity2d-bzr PKGBUILD with $EDITOR? [Y/n] n
==> Determining latest bzr revision...
You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data.  See "bzr help launchpad-login".
  -> Version found: 592
==> Making package: unity2d-bzr 592-1 (Mon Jun 13 18:11:50 EDT 2011)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
  -> Found gio.patch
==> Validating source files with md5sums...
    gio.patch ... Passed
==> Extracting Sources...
==> Removing existing pkg/ directory...
==> Starting build()...
Tree is up to date at revision 592 of branch http://bazaar.launchpad.net/~unity-2d-team/unity-2d/trunk
==> The local files are updated.
==> Bazaar checkout done or server timeout
==> Starting make...
==> Cleaning the previous build directory...
Branched 592 revision(s).
can't find file to patch at input line 3
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|*** unity-2d/launcher/UnityApplications/CMakeLists.txt 2011-06-01 12:45:29.000000000 +1100
|--- build/launcher/UnityApplications/CMakeLists.txt    2011-06-01 12:45:36.000000000 +1100
--------------------------
File to patch: