diff --git a/pkgs/applications/networking/browsers/chromium/source/default.nix b/pkgs/applications/networking/browsers/chromium/source/default.nix
index 394dd81cc2f..6e0decbca25 100644
--- a/pkgs/applications/networking/browsers/chromium/source/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/source/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, patchutils, python
+{ stdenv, fetchpatch, patchutils, python
 , channel ? "stable"
 }:
 
@@ -19,7 +19,7 @@ let
 in stdenv.mkDerivation {
   name = "chromium-source-${version}";
 
-  src = fetchurl main;
+  src = main;
 
   buildInputs = [ python ]; # cannot patch shebangs otherwise
 
@@ -73,6 +73,6 @@ in stdenv.mkDerivation {
 
   passthru = {
     inherit version channel;
-    plugins = fetchurl binary;
+    plugins = binary;
   };
 }
diff --git a/pkgs/applications/networking/browsers/chromium/update.nix b/pkgs/applications/networking/browsers/chromium/update.nix
index d9c4e6a56e4..150031ab788 100644
--- a/pkgs/applications/networking/browsers/chromium/update.nix
+++ b/pkgs/applications/networking/browsers/chromium/update.nix
@@ -3,7 +3,7 @@
 let
   inherit (import ../../../../../. {
     inherit system;
-  }) lib runCommand writeText stdenv curl cacert nix;
+  }) lib runCommand fetchurl writeText stdenv curl cacert nix;
 
   sources = if builtins.pathExists ./upstream-info.nix
             then import ./upstream-info.nix
@@ -34,12 +34,12 @@ in rec {
   in {
     inherit (chanAttrs) version;
 
-    main = {
+    main = fetchurl {
       url = mkVerURL chanAttrs.version;
       inherit (chanAttrs) sha256;
     };
 
-    binary = let
+    binary = fetchurl (let
       mkUrls = arch: let
         mkURLForMirror = getDebURL channel chanAttrs.version arch;
       in map mkURLForMirror ([ debURL ] ++ debMirrors);
@@ -49,7 +49,7 @@ in rec {
     } else if !stdenv.is64bit && chanAttrs ? sha256bin32 then {
       urls = mkUrls "i386";
       sha256 = chanAttrs.sha256bin32;
-    } else throw "No Chrome plugins are available for your architecture.";
+    } else throw "No Chrome plugins are available for your architecture.");
   };
 
   update = let