From c9560ff4b176650c44178f4c250b02f05744ed87 Mon Sep 17 00:00:00 2001
From: "Yury G. Kudryashov" <urkud.urkud@gmail.com>
Date: Wed, 14 Nov 2007 21:57:26 +0000
Subject: [PATCH] useVersion function added

svn path=/nixpkgs/trunk/; revision=9669
---
 pkgs/top-level/all-packages.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dc848898bcf9..9b67eab12da0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -147,6 +147,13 @@ rec {
   getVersion = name: alts: builtins.getAttr
     (getConfig [ "environment" "versions" name ] "default") alts;
 
+  # The same, another syntax.
+  # Warning: syntax for configuration.nix changed too
+  useVersion = name: f: f
+  {
+	  version = getConfig [ "environment" "versions" name ];
+  };
+
   # Whether user enabled given feature for the given package?
   getFlag = flag: package: default:
   getConfig [ "environment" "flags" package flag ]