diff --git a/nixos/README.md b/nixos/README.md
index 615cc7a..0f69ea6 100644
--- a/nixos/README.md
+++ b/nixos/README.md
@@ -1,3 +1,13 @@
 # nixos
 
 Nix Flake for my Linux machines running NixOS.
+
+The directory structure can be interpreted as follows:
+
+- [`flake.nix`](./flake.nix): Main entrypoint for the configuration
+- [hosts/*hostname*](./hosts): Host-specific configuration by setting options
+- [modules](./modules): Declarations of options
+- [modules/users/*username*](./modules/users): Since users are dependent on a host machine to exist, they are defined as a module as well
+- [overlays](./overlays): Attribute overrides of Nix Packages
+- [secrets](./secrets): Encrypted files that hold secrets, for example SSH private keys
+
diff --git a/nixos/flake.lock b/nixos/flake.lock
index d488555..0bc894e 100644
--- a/nixos/flake.lock
+++ b/nixos/flake.lock
@@ -93,11 +93,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1697059129,
-        "narHash": "sha256-9NJcFF9CEYPvHJ5ckE8kvINvI84SZZ87PvqMbH6pro0=",
+        "lastModified": 1697456312,
+        "narHash": "sha256-roiSnrqb5r+ehnKCauPLugoU8S36KgmWraHgRqVYndo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5e4c2ada4fcd54b99d56d7bd62f384511a7e2593",
+        "rev": "ca012a02bf8327be9e488546faecae5e05d7d749",
         "type": "github"
       },
       "original": {