dotnetCorePackages.fetchNupkg: override avalonia to include upstream fix (#340493)

pkgs/build-support/dotnet/fetch-nupkg/overrides.nix

@@ -17,6 +17,38 @@
   #     buildInputs = old.buildInputs or [ ] ++ [ hello ];
   #   });
 
+  "Avalonia" =
+    package:
+    package.overrideAttrs (
+      old:
+      let
+        # These versions have a runtime error when built with `dotnet publish --no-build`
+        # When attempting to draw a window, Avalonia will throw "No precompiled XAML found"
+        #
+        # Introduced in https://github.com/AvaloniaUI/Avalonia/pull/13840
+        # Fixed by https://github.com/AvaloniaUI/Avalonia/pull/16835
+        affectedVersions = [
+          "11.1.0-beta1"
+          "11.1.0-beta2"
+          "11.1.0-rc1"
+          "11.1.0-rc2"
+          "11.1.0"
+          "11.1.1"
+          "11.1.2-rc1"
+          "11.1.2"
+          "11.1.3"
+          "11.2.0-beta1"
+        ];
+      in
+      lib.optionalAttrs (builtins.elem old.version affectedVersions) {
+        postPatch = ''
+          substituteInPlace {build,buildTransitive}/AvaloniaBuildTasks.targets \
+            --replace-fail 'BeforeTargets="CopyFilesToOutputDirectory;BuiltProjectOutputGroup"' \
+                           'BeforeTargets="CopyFilesToOutputDirectory;BuiltProjectOutputGroup;ComputeResolvedFilesToPublishList"'
+        '';
+      }
+    );
+
   "Avalonia.X11" =
     package:
     package.overrideAttrs (