vencord: set standalone build mode

This tells Vencord that it is not installed using its Git installation
method. Currently this doesn't do anything, as the only consumer of this
value is the updater code, that has been effectively disabled using a
patch.

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
(cherry picked from commit 1410783ff5)

pkgs/misc/vencord/default.nix

@@ -36,6 +36,7 @@ buildNpmPackage rec {
   npmDepsHash = "sha256-m+hczXog03Gz81CP/blkRJPaTrEhmLQFvVtOfWKYQL4=";
   npmFlags = [ "--legacy-peer-deps" ];
   npmBuildScript = if buildWebExtension then "buildWeb" else "build";
+  npmBuildFlags = [ "--" "--standalone" ];
 
   prePatch = ''
     cp ${./package-lock.json} ./package-lock.json
@@ -49,11 +50,12 @@ buildNpmPackage rec {
     ./disable-updater-ui.patch
   ];
 
-  installPhase = if buildWebExtension then ''
-    cp -r dist/chromium-unpacked/ $out
-  '' else ''
-    cp -r dist/ $out
-  '';
+  installPhase =
+    if buildWebExtension then ''
+      cp -r dist/chromium-unpacked/ $out
+    '' else ''
+      cp -r dist/ $out
+    '';
 
   meta = with lib; {
     description = "Vencord web extension";