kde-style-bespin has unmet dependency on libkdecorations4abi2

[Karl-Philipp Richter]

    $ sudo apt-get install kde-style-bespin
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    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-style-bespin : Depends: libkdecorations4abi2 (>= 4:4.11.1) but it is not installable
    E: Unable to correct problems, you have held broken packages.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: kde-style-bespin (not installed)
Uname: Linux 4.0.0-040000rc7-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Apr 8 02:56:00 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-04-02 (5 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: bespin
UpgradeStatus: No upgrade log present (probably fresh install)