fetchurl: add sageupstream mirror

pkgs/development/libraries/science/math/lcalc/default.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   src = fetchurl {
     # original at http://oto.math.uwaterloo.ca/~mrubinst/L_function_public/CODE/L-${version}.tar.gz, no longer available
     # "newer" version at google code https://code.google.com/archive/p/l-calc/source/default/source
-    url = "http://mirrors.mit.edu/sage/spkg/upstream/lcalc/lcalc-${version}.tar.bz2";
+    url = "mirror://sageupstream/lcalc/lcalc-${version}.tar.bz2";
     sha256 = "1c6dsdshgxhqppjxvxhp8yhpxaqvnz3d1mlh26r571gkq8z2bm43";
   };
 

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";
   };
 

pkgs/development/libraries/science/math/rubiks/default.nix

@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   name = "${pname}-${version}";
 
   src = fetchurl {
-    url = "http://mirrors.mit.edu/sage/spkg/upstream/rubiks/rubiks-${version}.tar.bz2";
+    url = "mirror://sageupstream/rubiks/rubiks-${version}.tar.bz2";
     sha256 = "0zdmkb0j1kyspdpsszzb2k3279xij79jkx0dxd9f3ix1yyyg3yfq";
   };
 

pkgs/development/libraries/science/math/sympow/default.nix

@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     # Original website no longer reachable
-    url = "http://mirrors.mit.edu/sage/spkg/upstream/sympow/sympow-${version}.tar.bz2";
+    url = "mirror://sageupstream/sympow/sympow-${version}.tar.bz2";
     sha256 = "0hphs7ia1wr5mydf288zvwj4svrymfpadcg3pi6w80km2yg5bm3c";
   };