kdeplasma-addons version 4:4.6.1-0ubuntu1 failed to build on armel

[Steve Langasek]

kdeplasma-addons version 4:4.6.1-0ubuntu1 failed to build on armel
Link to failed build: https://launchpad.net/ubuntu/+source/kdeplasma-addons/4:4.6.1-0ubuntu1/+buildjob/2300519

Direct link to the build log: https://launchpad.net/ubuntu/+source/kdeplasma-addons/4:4.6.1-0ubuntu1/+buildjob/2300519/+files/buildlog_ubuntu-natty-armel.kdeplasma-addons_4%3A4.6.1-0ubuntu1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Source-dependencies not satisfied'.
Excerpt 641 lines into the build log:

Checking for source dependency conflicts...
  /usr/bin/sudo /usr/bin/apt-get --purge $CHROOT_OPTIONS -q -y install kde-sc-dev-latest cdbs cmake debhelper pkg-kde-tools kdelibs5-dev kdepimlibs5-dev kdebase-workspace-dev libqt4-opengl-dev libboost1.42-dev libkexiv2-dev python libmarble-dev libqimageblitz-dev libeigen2-dev libxrender-dev shared-desktop-ontologies libattica-dev libxtst-dev libqalculate-dev libqwt5-qt4-dev shared-mime-info libglib2.0-dev libqca2-dev libxml2-dev
Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 kde-sc-dev-latest : Breaks: libmarble-dev (< 4:4.6.1) but 4:4.6.0-0ubuntu2 is to be installed
E: Broken packages
apt-get failed.
Package installation failed
Trying to reinstall removed packages:
Trying to uninstall newly installed packages:
Source-dependencies not satisfied; skipping kdeplasma-addons