Delete all previous derivations

[Joey Dumont]

Hi!

I am using guix on Arch Linux, installed through the AUR package, but with
a custom store directory: --with-store-dir=/cvmfs/soft.valandil.ca/2022.03.
I was running the daemon with options:

# /etc/systemd/system/guix-daemon.service.d/override.conf
[Service]
ExecStart=
ExecStart=/usr/bin/guix-daemon --build-users-group=guixbuild
--gc-keep-outputs=yes --gc-keep-derivations=yes

I have since updated my guix install to point to a new store: /cvmfs/
soft.valandil.ca/2022.04, but I keep getting errors when running guix pull:

$ guix pull
;;; WARNING: loading compiled file /usr/lib/guile/2.2/site-ccache/gnutls.go
failed:
;;; In procedure load-thunk-from-file: Invalid argument
;;; WARNING: loading compiled file /usr/lib/guile/2.2/site-ccache/gnutls.go
failed:
;;; In procedure load-thunk-from-file: Invalid argument
Updating channel 'guix-hpc' from Git repository at '
https://gitlab.inria.fr/guix-hpc/guix-hpc'...
Updating channel 'guix' from Git repository at '
https://git.savannah.gnu.org/git/guix.git'...
Authenticating channel 'guix', commits 9edb3f6 to 1d4f2cd (23 new
commits)...
Building from these channels:
  guix      https://git.savannah.gnu.org/git/guix.git 1d4f2cd
  guix-hpc  https://gitlab.inria.fr/guix-hpc/guix-hpc de22a12
guix pull: error: derivation `/cvmfs/
soft.valandil.ca/2022.03/compat/x86_64/linux/pf4z6hc1f9bwddsravnlacnb2i8p9xyl-guile-3.0.2.tar.xz.drv'
has incorrect output `/cvmfs/
soft.valandil.ca/2022.04/compat/x86_64/linux/92ip5misld973bsm73hfazwmd4n9d58z-guile-3.0.2.tar.xz',
should be `/cvmfs/
soft.valandil.ca/2022.03/compat/x86_64/linux/9gc2alnhkrilqdch2xzjg0vq9b44is43-guile-3.0.2.tar.xz
'

I tried stracing the guix pull, and deleted all cache entries I could,
~/.cache/{guile,guix}, and the previous store, but the error persists.
Where is that derivation stored so that it can be compared against the new
derivation? How can I delete it?

Thanks for any help.

Joey Dumont (Profile <http://blog.joey-dumont.ca/>)
The supreme elegance of Nature lies in its apparent simplicity.