From 94deea203566bd88ec1315ede95a4819d12f2976 Mon Sep 17 00:00:00 2001
From: Rickard Nilsson <rickynils@gmail.com>
Date: Tue, 24 Jun 2014 10:52:12 +0200
Subject: [PATCH] nixos: Add option hardware.sane.configDir

---
 nixos/modules/services/hardware/sane.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/hardware/sane.nix b/nixos/modules/services/hardware/sane.nix
index bbb59312753..3bf765c6f99 100644
--- a/nixos/modules/services/hardware/sane.nix
+++ b/nixos/modules/services/hardware/sane.nix
@@ -34,6 +34,12 @@ in
       description = "Packages providing extra SANE backends to enable.";
     };
 
+    hardware.sane.configDir = mkOption {
+      type = types.string;
+      default = "${saneConfig}/etc/sane.d";
+      description = "The value of SANE_CONFIG_DIR.";
+    };
+
   };
 
 
@@ -43,7 +49,7 @@ in
 
     environment.systemPackages = backends;
     environment.sessionVariables = {
-      SANE_CONFIG_DIR = mkDefault "${saneConfig}/etc/sane.d";
+      SANE_CONFIG_DIR = config.hardware.sane.configDir;
       LD_LIBRARY_PATH = [ "${saneConfig}/lib/sane" ];
     };
     services.udev.packages = backends;