From f63d20c57d2df4560b31ce3ad2b8a3bdff98e1b1 Mon Sep 17 00:00:00 2001
From: Matt Sturgeon <matt@sturgeon.me.uk>
Date: Wed, 19 Aug 2026 22:51:58 +0100
Subject: [PATCH] maintainers/update-ruby-packages: format with treefmt config

---
 maintainers/scripts/update-ruby-packages | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/maintainers/scripts/update-ruby-packages b/maintainers/scripts/update-ruby-packages
index b1de427029cd..5513a22ae3c8 100755
--- a/maintainers/scripts/update-ruby-packages
+++ b/maintainers/scripts/update-ruby-packages
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p bundler bundix nixfmt
+#!nix-shell -i bash -E 'with import ../.. {}; mkShell { packages = [ bash bundler bundix (import ../../ci {}).fmt.pkg ]; }'
 # shellcheck shell=bash
 
 set -euf -o pipefail
@@ -20,7 +20,7 @@ rm -f gemset.nix Gemfile.lock
 # platform from where it was executed.
 BUNDLE_FORCE_RUBY_PLATFORM=1 bundle lock
 bundix
-nixfmt gemset.nix
+treefmt --no-cache gemset.nix
 
 # Run checks against the update.
 if ! \