v2rayn: add update script

pkgs/by-name/v2/v2rayn/package.nix

@@ -37,7 +37,7 @@ buildDotnetModule rec {
       --replace-fail "/bin/bash" "${bash}/bin/bash"
   '';
 
-  dotnetInstallFlags = [ "-p:PublishReadyToRun=false" ];
+  dotnetBuildFlags = [ "-p:PublishReadyToRun=false" ];
 
   dotnet-sdk = dotnetCorePackages.sdk_8_0;
 
@@ -104,6 +104,8 @@ buildDotnetModule rec {
     magick "v2rayN/v2rayN.Desktop/Assets/v2rayN.ico[11]" $out/share/pixmaps/v2rayn.png
   '';
 
+  passthru.updateScript = ./update.sh;
+
   meta = {
     description = "GUI client for Windows and Linux, support Xray core and sing-box-core and others";
     homepage = "https://github.com/2dust/v2rayN";

pkgs/by-name/v2/v2rayn/update.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p bash nix nix-update
+
+set -eou pipefail
+
+nix-update v2rayn
+
+$(nix-build -A v2rayn.fetch-deps)