Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: buck2 0 -> 1
attrpath: buck2
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/fx72d1akwhb4jpxp5mnq9xhrmh0crlzg-packages.json.drv
building '/nix/store/fx72d1akwhb4jpxp5mnq9xhrmh0crlzg-packages.json.drv'...

Going to be running update for following packages:
 - buck2-2026-07-15

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - buck2-2026-07-15: UPDATING ...
 - buck2-2026-07-15: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/bu/buck2/hashes.json b/pkgs/by-name/bu/buck2/hashes.json
index cbf18a92f293..dc2efd5e4637 100644
--- a/pkgs/by-name/bu/buck2/hashes.json
+++ b/pkgs/by-name/bu/buck2/hashes.json
@@ -1,15 +1,15 @@
 {
-  "aarch64-darwin": {
-    "buck2": "sha256-CIysxyxAD6Q4vkBSw2eC9Wsq+GKHqt8T7OXpdy1yRVw=",
-    "rust-project": "sha256-o5m58wQ9zKkpa5GzgLpcLUV9LpA+n+MxVa/9hH9Tr40="
+  "x86_64-linux": {
+    "buck2": "sha256-7MPYB90LD+/xpCNoi9WYJjuDOdIj5oVXiocZZFbBnZU=",
+    "rust-project": "sha256-de0SbH6cbjdDhcPpDTjxBo5HgQ8yS1eokQYjQrHKIDY="
   },
   "aarch64-linux": {
     "buck2": "sha256-4jm/cvQKeYfbkCTrbV4yVkL2SWxYnexr5UwQCNJhihk=",
     "rust-project": "sha256-vGSOwVETwYqwBhkxlSTDJlVcMfbAIzYwDhEKbqz+6ok="
   },
-  "x86_64-linux": {
-    "buck2": "sha256-7MPYB90LD+/xpCNoi9WYJjuDOdIj5oVXiocZZFbBnZU=",
-    "rust-project": "sha256-de0SbH6cbjdDhcPpDTjxBo5HgQ8yS1eokQYjQrHKIDY="
+  "aarch64-darwin": {
+    "buck2": "sha256-CIysxyxAD6Q4vkBSw2eC9Wsq+GKHqt8T7OXpdy1yRVw=",
+    "rust-project": "sha256-o5m58wQ9zKkpa5GzgLpcLUV9LpA+n+MxVa/9hH9Tr40="
   },
   "version": "2026-07-15",
   "preludeGit": "caed0b8c0ee137c4e5e1f800a5054df151f490c2",

Package version did not change.