pantheon.appcenter: fix AppStream.PoolFlags being renamed

pkgs/desktops/pantheon/apps/appcenter/default.nix

@@ -7,6 +7,7 @@
 , desktop-file-utils
 , elementary-icon-theme
 , fetchFromGitHub
+, fetchpatch
 , flatpak
 , gettext
 , glib
@@ -38,6 +39,17 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-xktIHQHmz5gh72NEz9UQ9fMvBlj1BihWxHgxsHmTIB0=";
   };
 
+  patches = [
+    # Fix AppStream.PoolFlags being renamed
+    # Though the API break has been fixed in latest appstream,
+    # let's use the non-deprecated version anyway.
+    # https://github.com/elementary/appcenter/pull/1794
+    (fetchpatch {
+      url = "https://github.com/elementary/appcenter/commit/84bc6400713484aa9365f0ba73f59c495da3f08b.patch";
+      sha256 = "sha256-HNRCJ/5mRbEVjCq9nrXtdQOOk1Jj5jalApkghD8ecpk=";
+    })
+  ];
+
   nativeBuildInputs = [
     appstream-glib
     dbus # for pkg-config