bug#56012: guix pull fails. cannot build guix-package-cache.drv.

[Julien Lepiller]

On June 16, 2022 7:28:45 AM GMT+02:00, vidak@riseup.net wrote:
>hey all.
>
>vidak here.
>
>i cannot get `guix pull` to work for me.
>
>i am having issues getting the package-cache.drv to build.
>
>i was homeless, and unable to update my workstation for about... a
>month?
>
>here are some related issues:
>
>https://issues.guix.gnu.org/52650
>
>https://issues.guix.gnu.org/47949
>
>https://issues.guix.gnu.org/33661
>
>i can trace the output logs to this commit, which seems to be the
>offending one. 
>
>commit -- 3b50b327f7cf3226a0e37bc6afa1e921c9c075f7
>
>```
>~ $ cat
>/var/log/guix/drvs/zk/1hgixlv3gccgbriad7nr2xyla8bbzx-guix-package-cache.drv
>(repl-version 0 1 1)
>Generating package cache for
>'/gnu/store/1mzdd7rf9r34xiibcs1gpjsf7jkh6a0r-profile'...
>(exception unbound-variable (value #f) (value "Unbound variable: ~S")
>(value (libpng-1.2)) (value #f))
>```
>
>i can `guix pull --commit` to before 31-05-2022, but i cannot seem to
>pull to anything later than that date.
>
>can anyone help me?
>
>thanks so much in advance.
>
>~vidak
>
>https://zoinks.one/vidak
>
>
>

This is most likely because one of the channels you're using is still refering 
to libpng-1.2, but it was removed from guix recertly.