feat(update): get rid of updateCustomPackage func

packages/some-sass-language-server/default.nix

@@ -3,6 +3,7 @@
   lib,
   buildNpmPackage,
   makeWrapper,
+  nix-update-script,
   writeShellApplication,
   # update script deps
   nodejs_latest,
@@ -32,15 +33,23 @@ in
 
     npmDepsHash = "sha256-BRo71A07BhrioiBFisCR01OrVFTIagVTIClZ2Tpjidk=";
 
-    passthru.update = writeShellApplication {
-      name = "update";
-      runtimeInputs = [
-        nodejs_latest
-        prefetch-npm-deps
-        jq
-      ];
-      text = import ./update.nix;
-    };
+    passthru.updateScript = let
+      script = writeShellApplication {
+        name = "update";
+        runtimeInputs = [
+          nodejs_latest
+          prefetch-npm-deps
+          jq
+        ];
+        text = import ./update.nix;
+      };
+    in
+      nix-update-script {
+        extraArgs = [
+          "--version=skip"
+          "; ${script}"
+        ];
+      };
 
     meta = {
       mainProgram = pname;