snapd without systemd?

[Christoph Willing]

I'd like to run snapd on a machine without systemd. I've built all the 
code from https://github.com/snapcore/snapd after which the run-checks 
script seemed to run without error. However whenever I run snapd, the 
following error is returned:
     chris at d6:~/gowork/src$ sudo snapd
     Password:
     error: daemon does not handle 0 listeners right now, just one

 From the snapd.service and snapd.socket files, I gather that a 
listening socket needs to be set up at /run/snapd.socket. Can anyone 
advise if this is possible without systemd? Is it possible, for 
instance, to imitate the required listener socket functionality with the 
old inetd and, if so, any hints for an entry in inetd.conf & /etc/services?

Thanks for any help with this,
chris