diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index 5f9c423ce447..5a3b289d5286 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -19,9 +19,7 @@ let
   callPackage = newScope chromium;
 
   chromium = {
-    upstream-info = (import ./update.nix {
-      inherit (stdenv) system;
-    }).getChannel channel;
+    upstream-info = (callPackage ./update.nix {}).getChannel channel;
 
     mkChromiumDerivation = callPackage ./common.nix {
       inherit enableSELinux enableNaCl enableHotwording gnomeSupport
diff --git a/pkgs/applications/networking/browsers/chromium/update.nix b/pkgs/applications/networking/browsers/chromium/update.nix
index cff841995624..bd7e256bfa9d 100644
--- a/pkgs/applications/networking/browsers/chromium/update.nix
+++ b/pkgs/applications/networking/browsers/chromium/update.nix
@@ -1,9 +1,16 @@
-{ system ? builtins.currentSystem }:
+let maybePkgs = import ../../../../../. {}; in
+
+{ stdenv     ? maybePkgs.stdenv
+, runCommand ? maybePkgs.runCommand
+, fetchurl   ? maybePkgs.fetchurl
+, writeText  ? maybePkgs.writeText
+, curl       ? maybePkgs.curl
+, cacert     ? maybePkgs.cacert
+, nix        ? maybePkgs.nix
+}:
 
 let
-  inherit (import ../../../../../. {
-    inherit system;
-  }) lib runCommand fetchurl writeText stdenv curl cacert nix;
+  inherit (stdenv) lib;
 
   sources = if builtins.pathExists ./upstream-info.nix
             then import ./upstream-info.nix