package guile-1.8-libs 1.8.8+1-6ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127

Attempting to install Ubuntu Web Apps (update portion of the process), in 12.04, Update Manager requested a "partial udgrade" (to 12.10?). I allowed and, while in that process, this error occurred.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: guile-1.8-libs 1.8.8+1-6ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-45.70-generic 3.2.44
Uname: Linux 3.2.0-45-generic i686
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: i386
Date: Wed Jun 12 16:46:28 2013
ErrorMessage: subprocess installed post-installation script returned error exit status 127
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MarkForUpload: True
SourcePackage: guile-1.8
Title: package guile-1.8-libs 1.8.8+1-6ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127
UpgradeStatus: Upgraded to precise on 2013-06-12 (0 days ago)