diff --git a/configuration.nix b/configuration.nix
index 066512d..1d083e2 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -179,8 +179,6 @@ with pkgs;
     ./modules/monitoring.nix
     ./overlays/nix-direnv.nix
     ./overlays/openconnect-sso.nix
-    ./overlays/cyrus-sasl-oauth2.nix
-    ./overlays/isync-oauth2.nix
     ./overlays/emacs-vterm.nix
   ];
 
diff --git a/modules/periodic.nix b/modules/periodic.nix
index 1949019..e59a578 100644
--- a/modules/periodic.nix
+++ b/modules/periodic.nix
@@ -2,7 +2,9 @@
 
 with pkgs;
 
-{
+let isync-oauth2 = (isync.override { withCyrusSaslXoauth2 = true; });
+
+in {
   # Upgrade Doom Emacs daily
   systemd.user.services.doom-upgrade = {
     description = "Upgrade Doom Emacs";
diff --git a/modules/software.nix b/modules/software.nix
index 19071ee..2fcecd8 100644
--- a/modules/software.nix
+++ b/modules/software.nix
@@ -73,7 +73,7 @@ in {
     pdfgrep
     # Mail stack
     mu
-    isync-oauth2
+    (isync.override { withCyrusSaslXoauth2 = true; })
     msmtp
     # Media
     gimp
diff --git a/overlays/cyrus-sasl-oauth2.nix b/overlays/cyrus-sasl-oauth2.nix
deleted file mode 100644
index dd3f385..0000000
--- a/overlays/cyrus-sasl-oauth2.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{ config, lib, pkgs, inputs, ... }:
-
-let
-  cyrus-sasl-xoauth2 = with pkgs;
-    stdenv.mkDerivation {
-      name = "cyrus-sasl-xoauth2";
-      src = inputs.cyrus-sasl-xoauth2;
-      nativeBuildInputs =
-        [ autoreconfHook inputs.nixpkgs.legacyPackages."${system}".cyrus_sasl ];
-    };
-
-in {
-  nixpkgs.overlays = [
-    (final: prev: {
-      patched-cyrus-sasl-oauth2 = prev.cyrus_sasl.overrideAttrs (div: rec {
-        postInstall = ''
-          for lib in ${cyrus-sasl-xoauth2}/lib/sasl2/*; do
-            ln -sf $lib $out/lib/sasl2/
-          done
-        '';
-      });
-    })
-  ];
-}
diff --git a/overlays/isync-oauth2.nix b/overlays/isync-oauth2.nix
deleted file mode 100644
index eb3446a..0000000
--- a/overlays/isync-oauth2.nix
+++ /dev/null
@@ -1,14 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with pkgs;
-
-{
-
-  nixpkgs.overlays = [
-    (final: prev: {
-      isync-oauth2 = isync.overrideAttrs (div: rec {
-        buildInputs = [ openssl db patched-cyrus-sasl-oauth2 zlib ];
-      });
-    })
-  ];
-}