diff --git a/pkgs/build-support/fetchurl/mirrors.nix b/pkgs/build-support/fetchurl/mirrors.nix
index f5b94f3f0ff4..713e7db0e3ce 100644
--- a/pkgs/build-support/fetchurl/mirrors.nix
+++ b/pkgs/build-support/fetchurl/mirrors.nix
@@ -7,7 +7,7 @@ rec {
 
   # Mirrors for mirror://site/filename URIs, where "site" is
   # "sourceforge", "gnu", etc.
-  
+
   # SourceForge.
   sourceforge = [
     http://prdownloads.sourceforge.net/