treewide: use `pkgs.config` instead of `config.nixpkgs.config`

`pkgs` may be passed in externally, in which case `config.nixpkgs.config` will not be set.

Follow-up to #257458.

1 files changed, 1 insertions, 1 deletions

diff --git a/nixos/modules/programs/firefox.nix b/nixos/modules/programs/firefox.nix
index 43cf64cf1d82..83a3edaf813e 100644
--- a/nixos/modules/programs/firefox.nix
+++ b/nixos/modules/programs/firefox.nix
@@ -237,7 +237,7 @@ in
           # copy-pasted from the wrapper; TODO: figure out fix
           applicationName = cfg.package.binaryName or (lib.getName cfg.package);
 
-          nixpkgsConfig = config.nixpkgs.config.${applicationName} or {};
+          nixpkgsConfig = pkgs.config.${applicationName} or {};
           optionConfig = cfg.wrapperConfig;
           nmhConfig = {
             enableBrowserpass = nmh.browserpass;