package texlive-binaries 2020.20200327.54578-7 failed to install/upgrade: installed texlive-binaries package post-installation script subprocess returned error exit status 2

[Christopher Webster]

Situation arose after trying to install RoseGarden and LilyPond on this newly upgraded system.

ProblemType: Package
DistroRelease: Ubuntu 21.04
Package: texlive-binaries 2020.20200327.54578-7
Uname: Linux 5.4.73v64 aarch64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: arm64
CasperMD5CheckResult: unknown
Date: Thu Jun 10 00:14:07 2021
DuplicateSignature:
 package:texlive-binaries:2020.20200327.54578-7
 Setting up texlive-binaries (2020.20200327.54578-7) ...
 update-alternatives: error: unable to open file '/var/lib/dpkg/alternatives/my.cnf': No such device or address
 dpkg: error processing package texlive-binaries (--configure):
  installed texlive-binaries package post-installation script subprocess returned error exit status 2
ErrorMessage: installed texlive-binaries package post-installation script subprocess returned error exit status 2
ImageMediaBuild: 20201022
Python3Details: /usr/bin/python3.9, Python 3.9.5, unpackaged
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.20.9ubuntu1
 apt 2.2.3
SourcePackage: texlive-bin
Title: package texlive-binaries 2020.20200327.54578-7 failed to install/upgrade: installed texlive-binaries package post-installation script subprocess returned error exit status 2
UpgradeStatus: Upgraded to hirsute on 2021-06-09 (0 days ago)