From 3ac02dfc400588cfe3ecaa16f0a492d469140041 Mon Sep 17 00:00:00 2001
From: Robin Gloster <mail@glob.in>
Date: Wed, 22 Mar 2017 15:10:54 +0100
Subject: [PATCH] nixos-container: allow `_` in container name

fixes #15089
---
 pkgs/tools/virtualization/nixos-container/nixos-container.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/tools/virtualization/nixos-container/nixos-container.pl b/pkgs/tools/virtualization/nixos-container/nixos-container.pl
index 677abdb8bc7..84cfc9aa586 100755
--- a/pkgs/tools/virtualization/nixos-container/nixos-container.pl
+++ b/pkgs/tools/virtualization/nixos-container/nixos-container.pl
@@ -82,7 +82,7 @@ if ($action eq "list") {
 }
 
 my $containerName = $ARGV[1] or die "$0: no container name specified\n";
-$containerName =~ /^[a-zA-Z0-9\-]+$/ or die "$0: invalid container name\n";
+$containerName =~ /^[a-zA-Z0-9_-]+$/ or die "$0: invalid container name\n";
 
 sub writeNixOSConfig {
     my ($nixosConfigFile) = @_;