From ab83105bbe93cdaf10c4bdb4655428a2df8c7e24 Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@gnu.org>
Date: Sat, 26 Mar 2016 13:40:38 +0100
Subject: [PATCH] cvs: Allow checkouts when /tmp is a different device.
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* guix/build/cvs.scm (cvs-fetch): Use 'copy-recursively' instead of
'rename-file'.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>
---
 guix/build/cvs.scm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/guix/build/cvs.scm b/guix/build/cvs.scm
index bd5c50a51a..033b626b96 100644
--- a/guix/build/cvs.scm
+++ b/guix/build/cvs.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
+;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -58,7 +59,10 @@ Return #t on success, #f otherwise."
                            "-D" "-r")
                        revision
                        module))
-       (rename-file module directory)
+       ;; Copy rather than rename in case MODULE and DIRECTORY are on
+       ;; different devices.
+       (copy-recursively module directory)
+
        (with-directory-excursion directory
          (for-each delete-file-recursively (find-cvs-directories)))
        #t))