1 files changed, 15 insertions, 13 deletions
diff --git a/nixpkgs/nixos/doc/manual/configuration/overlayfs.section.md b/nixpkgs/nixos/doc/manual/configuration/overlayfs.section.md
index 592fb7c2e6f7..7027a6f426d4 100644
--- a/nixpkgs/nixos/doc/manual/configuration/overlayfs.section.md
+++ b/nixpkgs/nixos/doc/manual/configuration/overlayfs.section.md
@@ -4,21 +4,23 @@ NixOS offers a convenient abstraction to create both read-only as well writable
 overlays.
 
 ```nix
-fileSystems = {
-  "/writable-overlay" = {
-    overlay = {
-      lowerdir = [ writableOverlayLowerdir ];
-      upperdir = "/.rw-writable-overlay/upper";
-      workdir = "/.rw-writable-overlay/work";
+{
+  fileSystems = {
+    "/writable-overlay" = {
+      overlay = {
+        lowerdir = [ writableOverlayLowerdir ];
+        upperdir = "/.rw-writable-overlay/upper";
+        workdir = "/.rw-writable-overlay/work";
+      };
+      # Mount the writable overlay in the initrd.
+      neededForBoot = true;
     };
-    # Mount the writable overlay in the initrd.
-    neededForBoot = true;
+    "/readonly-overlay".overlay.lowerdir = [
+      writableOverlayLowerdir
+      writableOverlayLowerdir2
+    ];
   };
-  "/readonly-overlay".overlay.lowerdir = [
-    writableOverlayLowerdir
-    writableOverlayLowerdir2
-  ];
-};
+}
 ```
 
 If `upperdir` and `workdir` are not null, they will be created before the