From 30d47b54b1e1ca63fb4a3bce26cc51a7b6017e23 Mon Sep 17 00:00:00 2001
From: Justin Bedo <cu@cua0.org>
Date: Thu, 4 Oct 2018 13:52:47 +1000
Subject: Add def function to simplify overrides

---
 test-tnpair.nix | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'test-tnpair.nix')

diff --git a/test-tnpair.nix b/test-tnpair.nix
index 77b5727..f8c49ec 100644
--- a/test-tnpair.nix
+++ b/test-tnpair.nix
@@ -2,8 +2,11 @@ with (import <nixpkgs> {});
 with lib;
 
 let
-  bionix = (import <bionix> {}).extend (self: super: {
-    bwa = super.bwa // { index = attrs: super.bwa.index ({ flags = "-a is" ; } // attrs); };
+  bionix = (import <bionix> {}).extend (self: super: with self; {
+    bwa = with super.bwa; {
+      align = align;
+      index = def index { flags = "-a is"; };
+    };
   });
 
 in
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