Here it is:
$ bzcat $(guix build --log-file
/gnu/store/ciawm53ygcvs7gfpb54wpzb4kkgnag9i-guix-latest.drv)
copying and compiling to
'/gnu/store/r82flrikwwd6ir0qlbc8ssm1n1m2z9dw-guix-latest' with Guile 2.2.3...
loading... 25.9% of 667 filesrandom seed for tests: 1519531629
compiling... 100.0% of 667 files
Backtrace:
Exception thrown while printing backtrace:
In procedure public-lookup: Module named (system repl debug) does not exist
Some deprecated features have been used. Set the environment
variable GUILE_WARN_DEPRECATED to "detailed" and rerun the
program to get more information. Set it to "no" to suppress
this message.
