Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: feishin 0 -> 1
attrpath: feishin
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/4m36w9blyyz7f9cl6xl2rjljwwr329x9-packages.json.drv
building '/nix/store/4m36w9blyyz7f9cl6xl2rjljwwr329x9-packages.json.drv'...

Going to be running update for following packages:
 - feishin-1.15.1

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - feishin-1.15.1: UPDATING ...
 - feishin-1.15.1: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/fe/feishin/package.nix b/pkgs/by-name/fe/feishin/package.nix
index 094111c60555..305256060a1e 100644
--- a/pkgs/by-name/fe/feishin/package.nix
+++ b/pkgs/by-name/fe/feishin/package.nix
@@ -48,7 +48,7 @@ buildNpmPackage (finalAttrs: {
       src
       ;
     fetcherVersion = 4;
-    hash = "sha256-9uG0AxIBAmuIPywg3p9fFCXmRvM9zDLhWfluSLRnUXY=";
+    hash = "sha256-yycgsNmuTadY6SAYJsVMbeUzsOtaW8ylRKn7SOQlrbs=";
   };
 
   env.ELECTRON_SKIP_BINARY_DOWNLOAD = "1";

Package version did not change.