diff --git a/pkgs/os-specific/linux/intel-ocl/default.nix b/pkgs/os-specific/linux/intel-ocl/default.nix
index 06cb18b2377..026ce80c645 100644
--- a/pkgs/os-specific/linux/intel-ocl/default.nix
+++ b/pkgs/os-specific/linux/intel-ocl/default.nix
@@ -5,7 +5,11 @@ stdenv.mkDerivation rec {
   version = "5.0-63503";
 
   src = fetchzip {
-    url = "https://registrationcenter-download.intel.com/akdlm/irc_nas/11396/SRB5.0_linux64.zip";
+    # https://github.com/NixOS/nixpkgs/issues/166886
+    urls = [
+      "https://registrationcenter-download.intel.com/akdlm/irc_nas/11396/SRB5.0_linux64.zip"
+      "http://registrationcenter-download.intel.com/akdlm/irc_nas/11396/SRB5.0_linux64.zip"
+    ];
     sha256 = "0qbp63l74s0i80ysh9ya8x7r79xkddbbz4378nms9i7a0kprg9p2";
     stripRoot = false;
   };