diff --git a/home-environments/radio/files/.config/fish/functions/guix_shell.fish b/home-environments/radio/files/.config/fish/functions/guix_shell.fish
new file mode 100644
index 0000000..9ec6dad
--- /dev/null
+++ b/home-environments/radio/files/.config/fish/functions/guix_shell.fish
@@ -0,0 +1,5 @@
+function __guix_shell --on-variable PWD
+    if test -n (grep -x $PWD ~/.config/guix/shell-authorized-directories)
+        guix shell
+    end
+end