sysop@boxen:/etc/apt/sources.list.d$ sudo apt-get install libglib2.0-dev:i386
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 resolve the situation:

The following packages have unmet dependencies:
 libglib2.0-dev:i386 : Depends: libglib2.0-0:i386 (= 2.34.1-1ubuntu1) but 2.35.4-0ubuntu5~webupd8~quantal is to be installed
                       Depends: libglib2.0-bin:i386 (= 2.34.1-1ubuntu1)
                       Depends: libpcre3-dev:i386 (>= 1:8.30) but it is not going to be installed
                       Recommends: python:i386 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.