1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/science/math/rankwidth/default.nix b/pkgs/development/libraries/science/math/rankwidth/default.nix
index f38fce5831ee..fda54fe44ab1 100644
--- a/pkgs/development/libraries/science/math/rankwidth/default.nix
+++ b/pkgs/development/libraries/science/math/rankwidth/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
   name = "${pname}-${version}";
 
   src = fetchurl {
-    url = "http://mirrors.mit.edu/sage/spkg/upstream/rw/rw-${version}.tar.gz";
+    url = "mirror://sageupstream/rw/rw-${version}.tar.gz";
     sha256 = "1rv2v42x2506x7f10349m1wpmmfxrv9l032bkminni2gbip9cjg0";
   };