package libgl1-mesa-dri-lts-utopic 10.3.2-0ubuntu1~trusty2 failed to install/upgrade: trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri-lts-utopic:i386

[fcole90]

I cannot install the utopic stack for 14.04 because this error breaks the things.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libgl1-mesa-dri-lts-utopic 10.3.2-0ubuntu1~trusty2
ProcVersionSignature: Ubuntu 3.19.0-26.28~14.04.1-generic 3.19.8-ckt4
Uname: Linux 3.19.0-26-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.12
Architecture: amd64
Date: Wed Aug 26 07:31:21 2015
DuplicateSignature: package:libgl1-mesa-dri-lts-utopic:10.3.2-0ubuntu1~trusty2:trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri-lts-utopic:i386
ErrorMessage: trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri-lts-utopic:i386
InstallationDate: Installed on 2015-03-21 (157 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
SourcePackage: mesa-lts-utopic
Title: package libgl1-mesa-dri-lts-utopic 10.3.2-0ubuntu1~trusty2 failed to install/upgrade: trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri-lts-utopic:i386
UpgradeStatus: No upgrade log present (probably fresh install)

[fcole90 (fcole90)]

I managed to workaround the issue using aptitude, which automagically removed many conflicting packages. Please, may someone have a look here https://wiki.ubuntu.com/Kernel/LTSEnablementStack and check if the installation procedure is correct (I used the vivid one replacing the string vivid with utopic).