diff --git a/home/emacs/init.el b/home/emacs/init.el
index fe9bc03..7ca066e 100644
--- a/home/emacs/init.el
+++ b/home/emacs/init.el
@@ -433,6 +433,9 @@
   (add-to-list 'org-structure-template-alist '("json" . "src json"))
   (add-to-list 'org-structure-template-alist '("yaml" . "src yaml"))
 
+  ;; babel
+  (add-to-list 'org-babel-load-languages '(shell . t))
+
   ;; fix yaml fontify
   (add-to-list 'org-src-lang-modes '("yaml" . yaml-ts))
 
diff --git a/nixos/base.nix b/nixos/base.nix
index a74d1b1..93b1640 100644
--- a/nixos/base.nix
+++ b/nixos/base.nix
@@ -10,7 +10,7 @@
     efi.canTouchEfiVariables = true;
     systemd-boot = {
       enable = true;
-      configurationLimit = 10;
+      configurationLimit = 5;
     };
   };