1 files changed, 6 insertions, 2 deletions
diff --git a/nixpkgs/nixos/doc/manual/installation/installing-virtualbox-guest.section.md b/nixpkgs/nixos/doc/manual/installation/installing-virtualbox-guest.section.md
index 004838e586be..4b9ae0a9c55f 100644
--- a/nixpkgs/nixos/doc/manual/installation/installing-virtualbox-guest.section.md
+++ b/nixpkgs/nixos/doc/manual/installation/installing-virtualbox-guest.section.md
@@ -29,14 +29,18 @@ There are a few modifications you should make in configuration.nix.
 Enable booting:
 
 ```nix
-boot.loader.grub.device = "/dev/sda";
+{
+  boot.loader.grub.device = "/dev/sda";
+}
 ```
 
 Also remove the fsck that runs at startup. It will always fail to run,
 stopping your boot until you press `*`.
 
 ```nix
-boot.initrd.checkJournalingFS = false;
+{
+  boot.initrd.checkJournalingFS = false;
+}
 ```
 
 Shared folders can be given a name and a path in the host system in the