Reconfigure on newly installed computer fails because of missing dependencies in pywal

[Frewacom]

Attempting to reconfigure on a new installation of Guix will fail, telling you that the file containing your config is missing, e.g:

guix system: error: failed to load '/home/fredrik/entry.scm': No such file or directory

This is caused by imagemagick not being installed automatically when installing pywal. Current solution is to just manually install imagemagick.

I added (what I thought to be) a fix for this, which was to include imagemagick as a propagated input for pywal. Apparently, this does not work as expected.