diff --git a/hosts/hermes/doom/config.org b/hosts/hermes/doom/config.org
index a519f44..0d10eba 100644
--- a/hosts/hermes/doom/config.org
+++ b/hosts/hermes/doom/config.org
@@ -889,7 +889,13 @@ mu4e + mbsync + msmtp:
   (setq! xref-show-xrefs-function #'consult-xref
          xref-show-definitions-function #'consult-xref
          eglot-send-changes-idle-time 0.2
-         eglot-extend-to-xref t))
+         eglot-extend-to-xref t)
+
+  (setq-default eglot-workspace-configuration
+                '(:nil  (:formatting (:command ["nixpkgs-fmt"])
+                         :nix (:flake (:autoArchive t
+                                       :autoEvalInputs t
+                                       :nixpkgsInputName "nixpkgs"))))))
 #+end_src
 
 * Little things