diff --git a/pkgs/build-support/fetchurl/mirrors.nix b/pkgs/build-support/fetchurl/mirrors.nix
index 4f126222a70..2fc8ce4eec2 100644
--- a/pkgs/build-support/fetchurl/mirrors.nix
+++ b/pkgs/build-support/fetchurl/mirrors.nix
@@ -1,4 +1,4 @@
-{
+rec {
   # Content-addressable Nix mirrors.
   hashedMirrors = [
     http://nix.cs.uu.nl/dist/tarballs
@@ -19,6 +19,8 @@
     http://kent.dl.sourceforge.net/sourceforge/
   ];
 
+  sf = sourceforge;
+
   # GNU.
   gnu = [
     ftp://ftp.nluug.nl/pub/gnu/