diff --git a/users/simon/modules/sway.nix b/users/simon/modules/sway.nix
index 8c87752..64c1789 100644
--- a/users/simon/modules/sway.nix
+++ b/users/simon/modules/sway.nix
@@ -3,33 +3,14 @@ let
   common = import ./common.nix;
   solarized = common.colorschemes.solarized;
 
-  wallpaperUnfree = pkgs.stdenvNoCC.mkDerivation {
+  # Source: “境目” by 3211 on Pixiv: https://www.pixiv.net/en/artworks/39266182
+  wallpaperUnfree = pkgs.fetchurl {
     name = "wallpaper-unfree";
 
-    src = pkgs.fetchurl {
-      url = "https://i.pximg.net/img-original/img/2013/10/22/04/25/37/39266182_p0.jpg";
-      sha256 = "053gc9jd4cbkkwgcirrhpzbn933dfh83l30p1sz55m5d8zx1lk65";
-      curlOpts = "--referer https://pixiv.net";
-    };
+    url = "https://i.pximg.net/img-original/img/2013/10/22/04/25/37/39266182_p0.jpg";
+    sha256 = "053gc9jd4cbkkwgcirrhpzbn933dfh83l30p1sz55m5d8zx1lk65";
+    curlOpts = "--referer https://pixiv.net";
 
-    nativeBuildInputs = [
-      pkgs.unstable.waifu2x-converter-cpp
-    ];
-
-    # -o $out does not work (why?)
-    buildPhase = ''
-      waifu2x-converter-cpp -i $src -o wallpaper.png
-    '';
-
-    installPhase = ''
-      cp wallpaper.png $out
-    '';
-
-    dontUnpack = true;
-    dontConfigure = true;
-    dontFixup = true;
-
-    # Source: “境目” by 3211 on Pixiv: https://www.pixiv.net/en/artworks/39266182
     meta.license = lib.licenses.unfree;
   };
   wallpaperFree = pkgs.fetchurl {