package runit 2.1.2-3ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

replacing systemd with upstart and runit gave this error

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: runit 2.1.2-3ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
AptOrdering:
 fgetty: Install
 runit: Install
 fgetty: Configure
 runit: Configure
 NULL: ConfigurePending
Architecture: amd64
Date: Mon Jan 16 05:08:49 2017
Dependencies:
 fgetty 0.7-1
 gcc-6-base 6.0.1-0ubuntu1
 libc6 2.23-0ubuntu5
 libgcc1 1:6.0.1-0ubuntu1
DuplicateSignature:
 package:runit:2.1.2-3ubuntu1
 Setting up runit (2.1.2-3ubuntu1) ...
 start: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused
 dpkg: error processing package runit (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-11-24 (52 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.18
SourcePackage: runit
Title: package runit 2.1.2-3ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)