Debian Wheezy: rvm requirements is marking as missing packages installed for a few architectures

rvm requirements:

    Missing required packages: libc6-dev, zlib1g, zlib1g-dev, libc6-dev.

Checking if first package is installed:
dpkg --get-selections | grep libc6-dev

    libc6-dev:amd64					install
    libc6-dev:i386					install

In my system all listed by rvm requirements packages are installed in amd64 and i386 versions.

My default architecture is amd64. If I have a package only in amd64 version then everything is ok. If I have it in amd64 and i386, like above, then rvm requirements is showing information that package is missing.

rvm --trace requirements after getting head from repository: https://gist.github.com/pskosinski/5380155

Additionally, as you can see on top, there is "libc6-dev, …, libc6-dev", I guess that one of them should be libc6.