From 492101dfce919350d1897f8c96ff402e7ca53827 Mon Sep 17 00:00:00 2001
From: Robin Gloster <mail@glob.in>
Date: Sat, 18 Feb 2017 22:40:31 +0100
Subject: [PATCH] nixos-container: fix destroy with immutable /var/empty

fixes #21573
---
 pkgs/tools/virtualization/nixos-container/nixos-container.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/tools/virtualization/nixos-container/nixos-container.pl b/pkgs/tools/virtualization/nixos-container/nixos-container.pl
index cde79f8a8208..65a9c3f5814b 100755
--- a/pkgs/tools/virtualization/nixos-container/nixos-container.pl
+++ b/pkgs/tools/virtualization/nixos-container/nixos-container.pl
@@ -248,6 +248,7 @@ if ($action eq "destroy") {
 
     safeRemoveTree($profileDir) if -e $profileDir;
     safeRemoveTree($gcRootsDir) if -e $gcRootsDir;
+    system("chattr", "-i", "$root/var/empty") if -e $root;
     safeRemoveTree($root) if -e $root;
     unlink($confFile) or die;
 }