diff --git a/krebs/5pkgs/override/default.nix b/krebs/5pkgs/override/default.nix
new file mode 100644
index 000000000..704831823
--- /dev/null
+++ b/krebs/5pkgs/override/default.nix
@@ -0,0 +1,12 @@
+with import <stockholm/lib>;
+self: super: {
+
+  exim = super.exim.overrideAttrs (old: rec {
+    name = warnOldVersion old.name "exim-4.92.2";
+    src = self.fetchurl {
+      url = "https://ftp.exim.org/pub/exim/exim4/${name}.tar.xz";
+      sha256 = "0m56jsh2fzvwj4rdpcc3pkd5vsi40cjrpzalis7l1zq33m4axmq1";
+    };
+  });
+
+}