gnome-keysign: Fix eval

future package is marked as broken so this was not evaluating.
As a result, in conjunction with https://github.com/python/cpython/issues/103847,
update.nix froze when trying to bump GNOME package set.

pkgs/by-name/gn/gnome-keysign/package.nix

@@ -1,6 +1,7 @@
 {
   lib,
   fetchFromGitLab,
+  fetchpatch,
   python3,
   wrapGAppsHook3,
   gobject-introspection,
@@ -22,6 +23,14 @@ python3.pkgs.buildPythonApplication rec {
     hash = "sha256-k77z8Yligzs4rHpPckRGcC5qnCHynHQRjdDkzxwt1Ss=";
   };
 
+  patches = [
+    # Remove broken future dependency
+    (fetchpatch {
+      url = "https://gitlab.gnome.org/GNOME/gnome-keysign/-/commit/ea197254baf70a499a371678369eda85aff7a4c5.patch";
+      hash = "sha256-Msd0NzNAkoAAxZ/WNiM3xV382lnx+xT6gyQiNGDEMM8=";
+    })
+  ];
+
   nativeBuildInputs = [
     wrapGAppsHook3
     gobject-introspection
@@ -43,7 +52,6 @@ python3.pkgs.buildPythonApplication rec {
 
   propagatedBuildInputs = with python3.pkgs; [
     dbus-python
-    future
     gpgme
     magic-wormhole
     pygobject3