Build failure on 002-use-multiarch-lib-paths.diff patch

While attempting to get this building in Jenkins I encountered a patching error:

dpkg-source: info: patches are not applied, applying them now
dpkg-source: info: applying 001-dbusmenu-doc-path.diff
dpkg-source: info: applying 002-use-multiarch-lib-paths.diff
dpkg-source: error: LC_ALL=C patch -t -F 0 -N -p1 -u -V never -g0 -E -b -B .pc/002-use-multiarch-lib-paths.diff/ < trunk/debian/patches/002-use-multiarch-lib-paths.diff gave error exit status 1
patching file CMakeLists.txt
patching file dbusmenu-qt.pc.in
patching file src/CMakeLists.txt
Hunk #1 FAILED at 73.
1 out of 1 hunk FAILED -- saving rejects to file src/CMakeLists.txt.rej
dpkg-buildpackage: error: dpkg-source --before-build trunk gave error exit status 1

I'm assuming this means that we just need to brush up the packaging branch. For the record I'm using this recipe, please correct:

# bzr-builder format 0.4
lp:libdbusmenu-qt
nest-part ubuntu lp:ubuntu/libdbusmenu-qt debian

Will attach the Jenkins build log, upping the importance as we'd like to see this build in Jenkins.