diff --git a/home/README.md b/home/README.md
index 591c59a..7f9290b 100644
--- a/home/README.md
+++ b/home/README.md
@@ -1,6 +1,5 @@
 # Home-Manager
 
-
 Create `~/.config/nixpkgs/home.nix` with:
 ```nix
 {pkgs, ...}:
diff --git a/nixos/README.md b/nixos/README.md
new file mode 100644
index 0000000..2d5a29d
--- /dev/null
+++ b/nixos/README.md
@@ -0,0 +1,37 @@
+# NixOS
+
+Create `/etc/nixos/configuration.nix` with:
+```nix
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ./hardware-configuration.nix
+      ./repo/default.nix
+      ./repo/desktop.nix
+      ./repo/genofire.nix
+    ];
+
+  system.stateVersion = "21.05";
+
+  # boot
+  boot.zfs.requestEncryptionCredentials = []; # list -> default: true - always request for password
+
+  # --------
+  # specifical this maschine:
+  # --------
+
+  networking.hostId = "6a465f93"; # zfs needed
+  networking.hostName = "fireEmerald"; # Define your hostname.
+  # cryptsetup
+  # boot.initrd.luks.enable = true;
+  boot.initrd.luks.devices = {
+    "croot" = {
+      device = "/dev/disk/by-uuid/e75385e9-b733-49d4-91fd-6ac2fa821195" ;
+    };
+  };
+}
+```
+
+and run `nixos-rebuild switch --upgrade`
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
new file mode 100644
index 0000000..700b7ac
--- /dev/null
+++ b/nixos/configuration.nix
@@ -0,0 +1,35 @@
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ./hardware-configuration.nix
+      ./repo/default.nix
+      ./repo/desktop.nix
+      ./repo/genofire.nix
+    ];
+
+  system.stateVersion = "21.05";
+
+  # boot
+  boot.zfs.requestEncryptionCredentials = []; # list -> default: true - always request for password
+
+  # --------
+  # specifical this maschine:
+  # --------
+
+  networking.hostId = "6a465f93"; # zfs needed
+  networking.hostName = "fireEmerald"; # Define your hostname.
+  # cryptsetup
+  # boot.initrd.luks.enable = true;
+  boot.initrd.luks.devices = {
+    "croot" = {
+      device = "/dev/disk/by-uuid/e75385e9-b733-49d4-91fd-6ac2fa821195" ;
+    };
+  };
+}
+