diff --git a/misc/wg-client-conf.nix b/misc/wg-client-conf.nix
index c7d5e5c..f4d29de 100644
--- a/misc/wg-client-conf.nix
+++ b/misc/wg-client-conf.nix
@@ -1,4 +1,3 @@
-# use nix-build -E (import <system>/misc/wg-client-conf.nix {})
 { pkgs ? import <nixpkgs> { }
 , address
 , privateKey
diff --git a/notes/vpn.md b/notes/vpn.md
index 07e2c6b..f143b42 100644
--- a/notes/vpn.md
+++ b/notes/vpn.md
@@ -1,6 +1,6 @@
 # WireGuard
 
-## Generate keypair
+## Generate key pair
 
 ```sh
 umask 077
@@ -8,6 +8,20 @@ wg genkey > ./private
 wg pubkey < ./private > ./public
 ```
 
+
+## Configuration
+
+Then create QR code with configuration using the following command:
+
+```sh
+nix build -f ./misc/wg-client-conf.nix \
+  --argstr address "" \
+  --argstr dns "" \
+  --argstr privateKey "$(cat private)" \
+  --argstr serverPublicKey "" \
+  --argstr serverEndpoint ""
+```
+
 # References:
 
 - https://nixos.wiki/wiki/WireGuard