diff --git a/pkgs/build-support/fetchurl/default.nix b/pkgs/build-support/fetchurl/default.nix
index 6300587a7d1..7d23a3a7f8f 100644
--- a/pkgs/build-support/fetchurl/default.nix
+++ b/pkgs/build-support/fetchurl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenvNoCC, curl }: # Note that `curl' may be `null', in case of the native stdenvNoCC.
+{ lib, buildPackages ? { inherit stdenvNoCC; }, stdenvNoCC, curl }: # Note that `curl' may be `null', in case of the native stdenvNoCC.
 
 let
 
@@ -10,7 +10,7 @@ let
   # resulting store derivations (.drv files) much smaller, which in
   # turn makes nix-env/nix-instantiate faster.
   mirrorsFile =
-    stdenvNoCC.mkDerivation ({
+    buildPackages.stdenvNoCC.mkDerivation ({
       name = "mirrors-list";
       builder = ./write-mirror-list.sh;
       preferLocalBuild = true;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a4ae7430e0f..5a1b9cfab69 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -283,8 +283,10 @@ in
   fetchhg = callPackage ../build-support/fetchhg { };
 
   # `fetchurl' downloads a file from the network.
-  fetchurl = makeOverridable (import ../build-support/fetchurl) {
-    inherit lib stdenvNoCC;
+  fetchurl = if stdenv.buildPlatform != stdenv.hostPlatform
+   then buildPackages.fetchurl # No need to do special overrides twice,
+   else makeOverridable (import ../build-support/fetchurl) {
+    inherit lib stdenvNoCC buildPackages;
     curl = buildPackages.curl.override (old: rec {
       # break dependency cycles
       fetchurl = stdenv.fetchurlBoot;