From f08b14c9d0e0a1d24b0a5d231ba7d448ef000106 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 30 Aug 2018 17:14:17 +0200
Subject: [PATCH] nix upgrade-nix: Improve error message if 'nix' is not in a
 profile

E.g.

  $ nix upgrade-nix
  error: directory '/home/eelco/Dev/nix/inst/bin' does not appear to be part of a Nix profile

instead of

  $ nix upgrade-nix
  error: '/home/eelco/Dev/nix/inst' is not a symlink
---
 src/nix/upgrade-nix.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nix/upgrade-nix.cc b/src/nix/upgrade-nix.cc
index 666ac68b0..2db60922a 100644
--- a/src/nix/upgrade-nix.cc
+++ b/src/nix/upgrade-nix.cc
@@ -113,7 +113,7 @@ struct CmdUpgradeNix : MixDryRun, StoreCommand
         Path profileDir = dirOf(where);
 
         // Resolve profile to /nix/var/nix/profiles/<name> link.
-        while (baseNameOf(dirOf(canonPath(profileDir))) != "profiles")
+        while (baseNameOf(dirOf(canonPath(profileDir))) != "profiles" && isLink(profileDir))
             profileDir = readLink(profileDir);
 
         printInfo("found profile '%s'", profileDir);