bug#39654: guix pull persistently errors when building guile3.0-ssh-0.12.0

[raingloom]

Here is the tail of the most recent pull log, I attached an earlier log 
separately.
This one had all channels disabled, but that didn't seem to change 
anything.

```
\builder for 
`/gnu/store/gj4pk7zn0wrvf5c9rl9x8gnd3719l98d-guile3.0-ssh-0.12.0.drv' 
failed with exit code 1
@ build-failed 
/gnu/store/gj4pk7zn0wrvf5c9rl9x8gnd3719l98d-guile3.0-ssh-0.12.0.drv - 1 
builder for 
`/gnu/store/gj4pk7zn0wrvf5c9rl9x8gnd3719l98d-guile3.0-ssh-0.12.0.drv' 
failed with exit code 1
Backtrace:
In ./guix/gexp.scm:
   757:2 19 (_ _)
In ./guix/monads.scm:
   482:9 18 (_ _)
In ./guix/gexp.scm:
  627:13 17 (_ _)
In ./guix/store.scm:
  1701:8 16 (_ _)
In ./guix/gexp.scm:
   896:2 15 (_ _)
   757:2 14 (_ _)
In ./guix/monads.scm:
   482:9 13 (_ _)
In ./guix/gexp.scm:
  627:13 12 (_ _)
In ./guix/store.scm:
  1701:8 11 (_ _)
In ./guix/gexp.scm:
   896:2 10 (_ _)
   757:2 9 (_ _)
In ./guix/monads.scm:
   482:9 8 (_ _)
In ./guix/gexp.scm:
  627:13 7 (_ _)
In ./guix/store.scm:
  1701:8 6 (_ _)
 1736:38 5 (_ #<store-connection 256.99 7fb0054f8300>)
In ./guix/packages.scm:
  948:16 4 (cache! #<weak-table 250/443> #<package guile3.0-ssh@0?> ?)
In ./guix/grafts.scm:
   323:4 3 (graft-derivation #<store-connection 256.99 7fb0054f83?> ?)
   172:4 2 (references-oracle #<store-connection 256.99 7fb0054f8?> ?)
  182:20 1 (_ _ _)
In ./guix/store.scm:
 1224:15 0 (_ #<store-connection 256.99 7fb0054f8300> _ _)

./guix/store.scm:1224:15: Throw to key `srfi-34' with args 
`(#<condition &store-protocol-error [message: "build of 
`/gnu/store/gj4pk7zn0wrvf5c9rl9x8gnd3719l98d-guile3.0-ssh-0.12.0.drv' 
failed" status: 100] 7fafffc67660>)'.
guix pull: error: You found a bug: the program 
'/gnu/store/0nbcv4jkhf73qlvc6dsy05iamj6l662c-compute-guix-derivation'
failed to compute the derivation for Guix (version: 
"01005f426958ab9e12f44c5e4a60ec1cdd605d5d"; system: "x86_64-linux";
host version: "668307c0d4f35743fb9fcad7f2198aa9b31ba6d5"; pull-version: 
1).
```

pull-log
Description: Text document