[Nix-dev] upgrading `gcc-wrapper-4.7.2' to `gcc-wrapper-4.6.3'

[Malcolm Matalka]

Hello,
I just installed NixOS yesterday so I'm quite new, but I did:

# nix-channel --update
# nix-env -u '*'

And I got:

upgrading `gcc-wrapper-4.7.2' to `gcc-wrapper-4.6.3'
building path(s)
`/nix/store/ff6a8q2wlyxhnfhx43b35h10b0gnlr31-user-environment'
created 811 symlinks in user environment

I'm curious why it is considered an upgrade to go from 4.7.2 to 4.6.3.

Thanks,
/M