install/60224: Release set base32 does not exist reported while trying to install NetBSD/amd64 11.0 RC3 from ISO

["liman%cafax.se@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60224
>Category:       install
>Synopsis:       Release set base32 does not exist reported while trying to install NetBSD/amd64 11.0 RC3 from ISO
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat May 02 09:45:00 +0000 2026
>Originator:     Lars-Johan Liman
>Release:        11.0 RC3
>Organization:
Cafax AB
>Environment:
I never got that far, but the utility shell from sysinst reports
NetBSD  11.0_RC3 (GENERIC) #0: Sat Apr  4 06:08:56 UTC 2026  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
That is the installer kernel, though, not the installed kernel from the final machine.
>Description:
I'm trying to install a VM on top of Proxmox from the 11.0_RC3/amd64 ISO. I have the blank VM boot from the ISO, which takes me into sysinst. I partition the drives, and ask for a full (or full-no-X11) installation, and tell sysinst to use the ISO for the installation sets.

After installing the sets kern-GENERIC, modules, and base, sysinst reports 

  Release set base32 does not exist. [Hit enter to continue]

So either sysinst incorrectly believes it needs that set, or the set needs to be provisioned on the ISO.

... unless I'm missing something obvious.

Thanks for all good work!
>How-To-Repeat:
See "full description".
>Fix: