diff --git a/tools/emacs/config/init.el b/tools/emacs/config/init.el
index 77977d4f4..45f90c98e 100644
--- a/tools/emacs/config/init.el
+++ b/tools/emacs/config/init.el
@@ -147,6 +147,7 @@
                           (local-set-key ">" 'self-insert-command)))))
 
 (use-package f)
+(use-package geiser)
 
 (use-package go-mode
   :bind (:map go-mode-map ("C-c C-r" . recompile))
diff --git a/tools/emacs/default.nix b/tools/emacs/default.nix
index 2ac64cccb..d8a536d6f 100644
--- a/tools/emacs/default.nix
+++ b/tools/emacs/default.nix
@@ -44,6 +44,7 @@ let
     elm-mode
     erlang
     exwm
+    geiser
     go-mode
     gruber-darker-theme
     haskell-mode