From 41dc859d7ed956addd01579a114549c1984206c5 Mon Sep 17 00:00:00 2001
From: tv <tv@shackspace.de>
Date: Sat, 17 Oct 2015 06:30:20 +0200
Subject: allow nix-env -f <stockholm>

---
 default.nix | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/default.nix b/default.nix
index b561cb7dd..7223a46e6 100644
--- a/default.nix
+++ b/default.nix
@@ -1,8 +1,10 @@
-{ current-date
-, current-host-name
-, current-user-name
+{ current-date ? abort "current-date not defined"
+, current-host-name ? abort "current-host-name not defined"
+, current-user-name ? builtins.getEnv "LOGNAME"
 }:
 
+assert current-user-name != "";
+
 let
   lib = import <nixpkgs/lib>;
 
-- 
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