Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: etcd_3_5 0 -> 1
attrpath: etcd_3_5
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] skipping because derivation has updateScript
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/11dfwln9cg2bqiixdwy41cdznxb0hb5b-packages.json.drv
building '/nix/store/11dfwln9cg2bqiixdwy41cdznxb0hb5b-packages.json.drv'...

Going to be running update for following packages:
 - etcd-3.5.29

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - etcd-3.5.29: UPDATING ...
 - etcd-3.5.29: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/et/etcd_3_5/package.nix b/pkgs/by-name/et/etcd_3_5/package.nix
index d9a04b1fa372..66e7ece6dc3e 100644
--- a/pkgs/by-name/et/etcd_3_5/package.nix
+++ b/pkgs/by-name/et/etcd_3_5/package.nix
@@ -8,11 +8,11 @@
 }:
 
 let
-  version = "3.5.29";
-  etcdSrcHash = "sha256-riihCSd7QsH+G+//XcV+DYn7kBbXAbTjEBEXcP/mh1w=";
-  etcdServerVendorHash = "sha256-eJKgZ2kFNrWI+uKKv1xD7tGLkWaGqa/ODjA09SwDAzg=";
-  etcdUtlVendorHash = "sha256-+1/E/VGpszXEIID7tgSbiCpe4KQkUcSKJJRAUdTUklQ=";
-  etcdCtlVendorHash = "sha256-Xznj9HPx4BTUpipBmucbKjIcQpj+diyw0FtsdQVV61Y=";
+  version = "3.5.30";
+  etcdSrcHash = "sha256-1FJOB9O1AP5zhQO+UtXeZ1zUUSLlNyrG8BKDNHn49aE=";
+  etcdServerVendorHash = "sha256-a8qk0KajYeAhqSHx87qjU1mWqd2z8JJmvL8VQiqD/eM=";
+  etcdUtlVendorHash = "sha256-zem39kXZivNYWhgGu7oC1/UuLcMfDLhd1Jgdi0EwKNM=";
+  etcdCtlVendorHash = "sha256-E6V6L6+eikcgCqE9+wJIdXnBCIuY+nq832TshYEvCL8=";
 
   src = fetchFromGitHub {
     owner = "etcd-io";

No auto update branch exists
There might already be an open PR for this update:
- etcd_{3,4,5}: update, cleanup
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/516214"