From 892b3f6ad622e536d75050fd2a3ae5243f4c4bf5 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Thu, 4 Oct 2012 23:26:01 -0400
Subject: [PATCH] acpid: Skip (rather than fail) if /proc/acpi doesn't exist

E.g. EC2 instances don't have ACPI.
---
 modules/services/hardware/acpid.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/services/hardware/acpid.nix b/modules/services/hardware/acpid.nix
index 2002df6a303c..57dc799ca8c0 100644
--- a/modules/services/hardware/acpid.nix
+++ b/modules/services/hardware/acpid.nix
@@ -105,6 +105,8 @@ in
         daemonType = "fork";
 
         exec = "acpid --confdir ${acpiConfDir}";
+
+        unitConfig.ConditionPathExists = [ "/proc/acpi" ];
       };
 
   };