From 09c14cd8aa7df29d5c752f650710b0928fce0317 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 12 Mar 2014 18:51:44 +0100
Subject: [PATCH] switch-to-configuration: Don't try to start masked units

---
 nixos/modules/system/activation/switch-to-configuration.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/system/activation/switch-to-configuration.pl b/nixos/modules/system/activation/switch-to-configuration.pl
index cb5b49692fe1..e0649448c834 100644
--- a/nixos/modules/system/activation/switch-to-configuration.pl
+++ b/nixos/modules/system/activation/switch-to-configuration.pl
@@ -128,7 +128,7 @@ while (my ($unit, $state) = each %{$activePrev}) {
     $baseName =~ s/\.[a-z]*$//;
 
     if (-e $prevUnitFile && ($state->{state} eq "active" || $state->{state} eq "activating")) {
-        if (! -e $newUnitFile) {
+        if (! -e $newUnitFile || abs_path($newUnitFile) eq "/dev/null") {
             push @unitsToStop, $unit;
         }