dpkg: ошибка при обработке пакета install-info (--configure):

Настраивается пакет install-info (6.5.0.dfsg.1-2) …
/usr/sbin/update-info-dir: 3: /etc/environment: source: not found
dpkg: ошибка при обработке пакета install-info (--configure):
 installed install-info package post-installation script subprocess returned error exit status 127
При обработке следующих пакетов произошли ошибки:
 install-info

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: install-info 6.5.0.dfsg.1-2
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 11 00:21:25 2018
InstallationDate: Installed on 2018-09-15 (25 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: texinfo
UpgradeStatus: No upgrade log present (probably fresh install)