Until now %LOAD-COMPILED-PATH would wrongfully contain:
CHANNEL/share/guile/site/X.Y
for each channel, thereby ignoring all the .go files of channels. This
fixes it so that %LOAD-COMPILED-PATH instead contains:
CHANNEL/lib/guile/X.Y/site-ccache
* guix/describe.scm (current-channel-entries): New procedure.
(package-path-entries): Change to return the %LOAD-COMPILED-PATH entries
as a second value.
* gnu/packages.scm (%package-module-path): Expect two values from
'package-path-entries' and augment %LOAD-COMPILED-PATH accordingly.