[gentoo-user] Why I can't I build systemd without ipv6?

[Daniel Frey <djqfrey@gmail.com>]

I switched ISPs a couple months back and have been struggling with 
networking issues (not LAN, just WAN.)

I have discovered that something is broken with my ISP's ipv6 support, 
every time I go to a website there's a 10-second delay. When syncing 
portage today I saw what the delay is: apparently it tries ipv6 twice, 
fails, then resorts to ipv4 which works fine.

Most of my systems now have ipv6 support removed, and viola! no more 
delays.

Except for the three systems I have that run systemd. I went in the 
kernel config to disable ipv6, and it won't let me - looking at the 
dependency list, it's systemd blocking this.

So *why* on earth is it a dependency when (from what I've been reading 
after discovering this) many ISPs don't seem to support it properly yet?

And is there a way to build systemd without ipv6? Or am I going to have 
to revert these three systems back to openrc?

Dan