maintainers/scripts/update-ruby-packages: force platform-independent bundler lock

Since Bundler 2+, the lock command generated platform-dependent
Gemfile.locks, which breaks when nix has to build gems from source,
because the gemset generated is tied to the platform which generated it.

Changed files
+4 -1
maintainers
+4 -1
maintainers/scripts/update-ruby-packages
···
(
cd pkgs/development/ruby-modules/with-packages
rm -f gemset.nix Gemfile.lock
-
bundle lock
+
# Since bundler 2+, the lock command generates a platform-dependent
+
# Gemfile.lock, hence causing to bundix to generate a gemset tied to the
+
# platform from where it was executed.
+
BUNDLE_FORCE_RUBY_PLATFORM=1 bundle lock
bundix
mv gemset.nix ../../../top-level/ruby-packages.nix
rm -f Gemfile.lock