From f72206b736e4fa1be010a05aa12fa57afea2019c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com>
Date: Mon, 27 Feb 2017 10:09:48 +0100
Subject: [PATCH] unpack-channel.nix: fix 'mv' corner case

unpack-channel.nix fails if the tarball contains a directory named the
same as the channel:

  mv: cannot move 'nixpkgs' to a subdirectory of itself, '.../nixpkgs'

This commit fixes that by not moving the directory if it already has the
correct name.
---
 corepkgs/unpack-channel.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/corepkgs/unpack-channel.nix b/corepkgs/unpack-channel.nix
index 9445532d..a654db40 100644
--- a/corepkgs/unpack-channel.nix
+++ b/corepkgs/unpack-channel.nix
@@ -15,7 +15,9 @@ let
       else
         ${bzip2} -d < $src | ${tar} xf - ${tarFlags}
       fi
-      mv * $out/$channelName
+      if [ * != $channelName ]; then
+        mv * $out/$channelName
+      fi
       if [ -n "$binaryCacheURL" ]; then
         mkdir $out/binary-caches
         echo -n "$binaryCacheURL" > $out/binary-caches/$channelName