diff --git a/.gitignore b/.gitignore
index 06b25ac..d12da7c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 /secret/
+/installer/*.lock
+/installer/result/
diff --git a/README.md b/README.md
index 7bbc740..ce5445e 100644
--- a/README.md
+++ b/README.md
@@ -1,32 +1,9 @@
 # Christoph Cullmann's NixOS configuration
 
-# build unstable installer with latest kernel
-
-
-```nix
-{
-  description = "installation media";
-  inputs.nixos.url = "nixpkgs/nixos-unstable";
-  outputs = { self, nixos }: {
-    nixosConfigurations = {
-      exampleIso = nixos.lib.nixosSystem {
-        system = "x86_64-linux";
-        modules = [
-          "${nixos}/nixos/modules/installer/cd-dvd/installation-cd-minimal-new-kernel-no-zfs.nix"
-          ({ config, pkgs, ... }: {
-            networking.wireless.enable = false;
-            networking.networkmanager.enable = true;
-          })
-        ];
-      };
-    };
-  };
-}
-```
+# build unstable minimal installer
 
 ```zsh
-git init
-git add flake.nix
+cd installer
 nix --extra-experimental-features flakes --extra-experimental-features nix-command build .#nixosConfigurations.exampleIso.config.system.build.isoImage
 
 doas dd if=result/iso/nixos-*-x86_64-linux.iso of=/dev/sda bs=4M conv=fsync
diff --git a/installer/flake.nix b/installer/flake.nix
new file mode 100644
index 0000000..19921c7
--- /dev/null
+++ b/installer/flake.nix
@@ -0,0 +1,18 @@
+{
+  description = "installation media";
+  inputs.nixos.url = "nixpkgs/nixos-unstable";
+  outputs = { self, nixos }: {
+    nixosConfigurations = {
+      exampleIso = nixos.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [
+          "${nixos}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
+          ({ config, pkgs, ... }: {
+            networking.wireless.enable = false;
+            networking.networkmanager.enable = true;
+          })
+        ];
+      };
+    };
+  };
+}