From 7840d00532f87ce0712522e0fbbdc335ce83fd3f Mon Sep 17 00:00:00 2001
From: Aaron Andersen <aaron@fosslib.net>
Date: Mon, 27 Aug 2018 21:15:03 +0000
Subject: [PATCH] clarified the descriptions of the allow and deny options

---
 nixos/modules/services/monitoring/incron.nix | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/monitoring/incron.nix b/nixos/modules/services/monitoring/incron.nix
index 5eec4b82fa02..4a9e1a9b7b8f 100644
--- a/nixos/modules/services/monitoring/incron.nix
+++ b/nixos/modules/services/monitoring/incron.nix
@@ -22,7 +22,14 @@ in
       allow = mkOption {
         type = types.nullOr (types.listOf types.str);
         default = null;
-        description = "Users allowed to use incrontab.";
+        description = ''
+          Users allowed to use incrontab.
+
+          If empty then no user will be allowed to have their own incrontab.
+          If null then will defer to <option>deny</option>.
+          If both <option>allow</option> and <option>deny</option> are null
+          then all users will be allowed to have their own incrontab.
+        '';
       };
 
       deny = mkOption {