diff --git a/.dir-locals.el b/.dir-locals.el
index 69a5219..1c19b79 100644
--- a/.dir-locals.el
+++ b/.dir-locals.el
@@ -1,4 +1,3 @@
 ;;; SPDX-License-Identifier: GPL-3.0-or-later
 ((nil . ((sentence-end-double-space . t)))
- (scheme-mode . ((geiser-active-implementations . (guile))
-                 (geiser-guile-binary . ("guix" "repl")))))
+ (scheme-mode . ((geiser-guile-binary . ("guix" "repl")))))
diff --git a/zilti/packages/.envrc b/zilti/packages/.envrc
new file mode 100644
index 0000000..4547b1e
--- /dev/null
+++ b/zilti/packages/.envrc
@@ -0,0 +1 @@
+use guix chicken-rss
diff --git a/zilti/packages/chicken.scm b/zilti/packages/chicken.scm
index 5c2b56a..6d4fd51 100644
--- a/zilti/packages/chicken.scm
+++ b/zilti/packages/chicken.scm
@@ -1,3 +1,4 @@
+;; -*- geiser-scheme-implementation: guile; mode: scheme; -*-
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2020 Ekaitz Zarraga <ekaitz@elenq.tech>
 ;;; Copyright © 2020 Evan Hanson <evhan@foldling.org>
@@ -27,6 +28,7 @@
   #:use-module (guix git-download)
   #:use-module (guix svn-download)
   #:use-module (gnu packages commencement)
+  #:use-module (gnu packages chicken)
   #:use-module ((guix licenses)
                 #:prefix license:))
 
diff --git a/zilti/packages/egg-generator.scm b/zilti/packages/egg-generator.scm
new file mode 100644
index 0000000..3d54585
--- /dev/null
+++ b/zilti/packages/egg-generator.scm
@@ -0,0 +1,4 @@
+;; -*- geiser-scheme-implementation: chicken; mode: scheme; -*-
+
+(import (rss))
+