diff --git a/emacs.nix b/emacs.nix
index dad2c106c..019dd26b2 100644
--- a/emacs.nix
+++ b/emacs.nix
@@ -106,6 +106,7 @@ in emacsWithPackages(epkgs:
 
   # Bleeding-edge packages:
   (with epkgs.melpaPackages; [
+    edit-server
     helm-pass
     pg
     racket-mode