tweak(qtile): specify wallpaper in Nix

users/infinidoge/config/default.nix

@@ -68,7 +68,18 @@ with lib;
         image_size="470px"
       '';
   } // optionalAttrs main.info.graphical {
-    "qtile".source = ./qtile;
+    "qtile".source = pkgs.substituteSubset {
+      src = ./qtile;
+      files = [ "config.py" ];
+
+      wallpaper = pkgs.fetchurl {
+        name = "BotanWallpaper.jpg";
+        # Source: https://www.pixiv.net/en/artworks/86093828
+        url = "https://safebooru.org//images/3159/6c2d22b1fcac19a679de61f713c56503bca5aad9.jpg";
+        sha256 = "sha256-3oVx9k+IN8GI8EWx3kPiQWdPGSO645abrEIL8C6sNq8=";
+      };
+      wallpaper_mode = "fill";
+    };
 
     "blugon".source = ./blugon;
   };

users/infinidoge/config/qtile/config.py

@@ -666,8 +666,8 @@ screens = [
             size=20,
             opacity=1.0,
         ),
-        wallpaper="~/.config/qtile/images/BotanBackground.jpg",
-        wallpaper_mode="fill",
+        wallpaper="@wallpaper@",
+        wallpaper_mode="@wallpaper_mode@",
     )
     for i in range(
         int(run_command("xrandr --listmonitors | grep 'Monitors:' | awk {'print $2'}"))