Add lock command

i3.nix

@@ -5,7 +5,7 @@ let
 in {
   # Dependencies
   home.packages = with pkgs; [
-    i3lock # lockscreen
+    (pkgs.callPackage ./lock { })
     playerctl # pactl comes with PulseAudio
     scrot # Screnshot keybindings
     xclip # Copying screenshots to clipboard
@@ -23,7 +23,7 @@ in {
       };
       startup = [
         {
-          command = "(systemctl --user restart polybar &) && i3lock -i `readlink -f ~/.background-image`";
+          command = "(systemctl --user restart polybar &) && lock";
           always = true;
           notification = false;
         }

lock/default.nix

@@ -0,0 +1,9 @@
+{ substituteAll, pkgs }:
+
+substituteAll {
+  name = "lock";
+  src = ./lock.sh;
+  dir = "bin";
+  isExecutable = true;
+  inherit (pkgs) i3lock;
+}

lock/lock.sh

@@ -0,0 +1 @@
+i3lock -i `readlink -f ~/.background-image`