From 897b524889100a70123b3a4a513222f44cc0c19b Mon Sep 17 00:00:00 2001
From: tv <tv@shackspace.de>
Date: Wed, 5 Nov 2014 05:08:52 +0100
Subject: env.nix: export HISTFILE only if ~/.history exists

---
 env.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/env.nix b/env.nix
index 55d735c..0377835 100644
--- a/env.nix
+++ b/env.nix
@@ -10,7 +10,9 @@ let
   ];
 
   extraCmds = ''
-    export HISTFILE="\$HOME/.history/env-${name}"
+    if test -d "\$HOME/.history"; then
+      export HISTFILE="\$HOME/.history/env-${name}"
+    fi
     $(grep export ${hsEnv.outPath}/bin/ghc)
   '';
 
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