bug#23103: A number of corrupt packages on Hydra?

[Pjotr Prins]

 http://mirror.guixsd.org/nar/6kvy3ryb04nl49wwdy0dmhhfnfbwrmna-tcl-8.6.4 
1017KiB/s 00:02 | 1.7MiB transferred
bzip2: Compressed file ends unexpectedly;
        perhaps it is corrupted?  *Possible* reason follows.
bzip2: Inappropriate ioctl for device
        Input file = (stdin), output file = (stdout)

It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.

You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.

guix substitute: error: corrupt input while restoring 
'/gnu/store/6kvy3ryb04nl49wwdy0dmhhfnfbwrmna-tcl-8.6.4/lib/tcl8.6/encoding/cp936.enc'
 from #{read pipe}#
killing process 55815