denemo typesetter needs newer lilypond

The version of Denemo in Ubuntu 21.10 is 2.5.0. It needs LilyPond version 2.8.7, but the repository doesn't include the proper version of LilyPond.

ubuntu 21.10

denemo:
  Installed: 2.5.0-1
  Candidate: 2.5.0-1
  Version table:
 *** 2.5.0-1 500
        500 http://www.gtlib.gatech.edu/pub/ubuntu impish/universe amd64 Packages
        100 /var/lib/dpkg/status

I attempted to typeset the example program InstrumentNames.denemo. Denemo complains that the program was typeset assuming to use LilyPond 2.8.7, but that Denemo Preferences -> Externals -> lilypond is set to 2.22. I can't see how to change that, but also I don't think that a newer version of LilyPond is in the repository.

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: denemo 2.5.0-1
ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19
Uname: Linux 5.13.0-22-generic x86_64
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Dec 14 11:33:43 2021
InstallationDate: Installed on 2021-12-08 (5 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: denemo
UpgradeStatus: No upgrade log present (probably fresh install)