* Added an option `nixpkgs.config' that allows the Nixpkgs options to

  be set from the NixOS configuration.  For instance, you can say

    nixpkgs.config.firefox.enableGeckoMediaPlayer = true;

    environment.systemPackages = [ pkgs.firefox ];

  but the more interesting application is to apply global overrides to
  Nixpkgs throughout NixOS, e.g.

    nixpkgs.config.packageOverrides = pkgs:
      { glibc = pkgs.glibc27;
        gcc = pkgs.gcc42;
      };

  would build the whole system with Glibc 2.7 and GCC 4.2.  (There are
  some issues with "useFromStdenv" in all-packages.nix that need to be
  fixed for packages in the stdenv bootstrap though.)

  The implementation of this option is kind of evil though due to the
  need to prevent a circularity between the evaluation of
  nixpkgs.config and the "pkgs" module argument.

svn path=/nixos/trunk/; revision=16866

1 files changed, 17 insertions, 0 deletions

diff --git a/modules/misc/nixpkgs.nix b/modules/misc/nixpkgs.nix
new file mode 100644
index 00000000000..68e7e2517f9
--- /dev/null
+++ b/modules/misc/nixpkgs.nix
@@ -0,0 +1,17 @@
+{ config, pkgs, ... }:
+
+{
+  options = {
+
+    nixpkgs.config = pkgs.lib.mkOption {
+      default = {};
+      example = {
+        firefox.enableGeckoMediaPlayer = true;
+      };
+      description = ''
+        The configuration of the Nix Packages collection.
+      '';
+    };
+
+  };
+}
\ No newline at end of file