Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: _1password-gui 0 -> 1
attrpath: _1password-gui
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[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/ybn655b51kn2pv3x591cpzbz8nmx1qjz-packages.json.drv
building '/nix/store/ybn655b51kn2pv3x591cpzbz8nmx1qjz-packages.json.drv'...
structuredAttrs is enabled

Going to be running update for following packages:
 - 1password-8.12.38

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - 1password-8.12.38: UPDATING ...
 - 1password-8.12.38: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/_1/_1password-gui/sources.json b/pkgs/by-name/_1/_1password-gui/sources.json
index 0f501ec84b00..75280a1eaa42 100644
--- a/pkgs/by-name/_1/_1password-gui/sources.json
+++ b/pkgs/by-name/_1/_1password-gui/sources.json
@@ -1,28 +1,28 @@
 {
   "stable": {
     "linux": {
-      "version": "8.12.38",
+      "version": "8.12.40",
       "sources": {
         "x86_64": {
-          "url": "https://downloads.1password.com/linux/tar/stable/x86_64/1password-8.12.38.x64.tar.gz",
-          "hash": "sha256-i5dnJ2rWeVqPG3kwaqgoL315YXx8oIvtp4Rv95obtPI="
+          "url": "https://downloads.1password.com/linux/tar/stable/x86_64/1password-8.12.40.x64.tar.gz",
+          "hash": "sha256-CulkXTG+eKj7V9FfSeX6TwtnoLNgh5ekEOj9NvAgYmY="
         },
         "aarch64": {
-          "url": "https://downloads.1password.com/linux/tar/stable/aarch64/1password-8.12.38.arm64.tar.gz",
-          "hash": "sha256-y4s2Z6D1FwXkCk4eSrg9RAxXMkz6s/O/rLcT5A5jEp0="
+          "url": "https://downloads.1password.com/linux/tar/stable/aarch64/1password-8.12.40.arm64.tar.gz",
+          "hash": "sha256-dHbA/IIVM4zZ8wSxSCJogBD9jtVNXqQ2fAu79yhFvh4="
         }
       }
     },
     "darwin": {
-      "version": "8.12.38",
+      "version": "8.12.40",
       "sources": {
         "x86_64": {
-          "url": "https://downloads.1password.com/mac/1Password-8.12.38-x86_64.zip",
-          "hash": "sha256-K/S/IHfe3vPtgNEQdqXxKkdgJrNVwlYrEHD35Qr/kkM="
+          "url": "https://downloads.1password.com/mac/1Password-8.12.40-x86_64.zip",
+          "hash": "sha256-F8qK0ed68QPmzymG0CjyEucfGRlct8YLu9MUJngnmH8="
         },
         "aarch64": {
-          "url": "https://downloads.1password.com/mac/1Password-8.12.38-aarch64.zip",
-          "hash": "sha256-MKFMOsau1Mh1OA4OPU4lrAxY/eTCGdu4nkBnVjygx0w="
+          "url": "https://downloads.1password.com/mac/1Password-8.12.40-aarch64.zip",
+          "hash": "sha256-evGFgdOODNImOyNBhurtSxaE5VnhR9zOtL8/x37npUM="
         }
       }
     }

No auto update branch exists
There might already be an open PR for this update:
- _1password-gui: 8.12.38 -> 8.12.40
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/574111"