From b4b1fe9d2f7321a95fa16d18a5f0088908122361 Mon Sep 17 00:00:00 2001
From: Eric Bavier <bavier@member.fsf.org>
Date: Sat, 6 Jun 2015 06:43:19 -0500
Subject: profiles: Process ghc conf files only once.

A package may be listed in the manifest inputs multiple times.  Avoid
copying ghc *.conf files twice by deleting duplicates.

* guix/profiles.scm (ghc-package-cache-file)[conf-files]: Delete
  duplicate manifest inputs before copying conf files.
---
 guix/profiles.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/guix/profiles.scm b/guix/profiles.scm
index 33a0511a3a..5c19c95d42 100644
--- a/guix/profiles.scm
+++ b/guix/profiles.scm
@@ -512,7 +512,8 @@ (define (copy-conf-file conf)
         (system* (string-append #+ghc "/bin/ghc-pkg") "init" db-dir)
         (for-each copy-conf-file
                   (append-map conf-files
-                              '#$(manifest-inputs manifest)))
+                              (delete-duplicates
+                               '#$(manifest-inputs manifest))))
         (let ((success
                (zero?
                 (system* (string-append #+ghc "/bin/ghc-pkg") "recache"
-- 
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