Subject: search-patch fails to consult GUIX_PACKAGE_PATH

From: Mark H Weaver <[email-masked]>
Date: Sat, 13 Dec 2014 03:43:14 -0500

Tomáš Čech <[email-masked]> reported on IRC that 'search-patch'
failed to find a patch he had put into DIR/gnu/packages/patches/, where
DIR was in $GUIX_PACKAGE_PATH.  Adding DIR to GUILE_LOAD_PATH fixed the
problem.

Also, it would be good to improve the error message when 'search-patch'
fails.  This is what he reported seeing:

--8<---------------cut here---------------start------------->8---
guix/packages.scm:374:17: In procedure #<procedure 47c70c0 at guix/packages.scm:372:9 (number patch)>:
guix/packages.scm:374:17: Throw to key `match-error' with args `("match" "no matching pattern" #f)'.
--8<---------------cut here---------------end--------------->8---

      Mark