Installing additional packages or updating existing packages for the container based on ubuntu-12-04 EZ template fails with the following error:
"Internal Error, No file name for libc6"
This behavior is a confirmed Ubuntu bug - the libc6 package is not properly configured inside container.
The solution for such issue described in the bug itself:
1. Log into the container 2. Fix broken dependencies using apt-get # apt-get install -f 3. Install libc6 package: # dpkg -i /var/cache/apt/archives/libc6_2.15-0ubuntu10.5_i386.deb 4. Configure installed package: # dpkg --configure -a
Once completing this command sequence you'll be able to update the container.