[bug] no recent ruby gem builds available for x86_64

[lingmann]

Product

BAML

Describe the bug

It appears that the latest ruby gem build for x86 macs is 0.54.0 ... :(

Reproduction Steps

❯ grep baml Gemfile
gem "baml", "0.90.2"

❯ bundle install
Fetching gem metadata from https://rubygems.org/.........
Could not find gems matching 'baml (= 0.90.2)' valid for all resolution platforms (aarch64-linux, aarch64-linux-gnu, aarch64-linux-musl, arm64-darwin, x86_64-darwin,
x86_64-darwin-22, x86_64-linux, x86_64-linux-gnu, x86_64-linux-musl) in rubygems repository https://rubygems.org/ or installed locally.

The source contains the following gems matching 'baml (= 0.90.2)':
  * baml-0.90.2-aarch64-linux
  * baml-0.90.2-aarch64-linux-musl
  * baml-0.90.2-arm-linux
  * baml-0.90.2-arm64-darwin
  * baml-0.90.2-x86_64-linux
  * baml-0.90.2-x86_64-linux-musl

BAML Version

0.90.2

Language/Framework

Ruby

LLM Provider

Mistral

LLM Model

No response

Operating System

macOS

Browser

Chrome

Code Editor

Cursor

[linear[bot]]

BAML-518

[gvarela]

Additional Data Point: arm64-darwin-24 (macOS 15 Sequoia) Platform Resolution Issue

I'm experiencing the same platform resolution problem on macOS 15 Sequoia (arm64-darwin-24):

Environment

• macOS Version: 15.7.1 (darwin24)
• Ruby Version: 3.4.4
• Bundler Version: 2.6.6
• Platform: arm64-darwin-24
• BAML Gem Version Attempted: 0.90.2

Error

$ bundle add baml
Could not find gems matching 'baml' valid for all resolution platforms 
(arm64-darwin, aarch64-linux, ruby, arm64-darwin-24) in rubygems repository 
https://rubygems.org/ or installed locally.

The source contains the following gems matching 'baml':
  * baml-0.90.2-aarch64-linux
  * baml-0.90.2-aarch64-linux-musl
  * baml-0.90.2-arm-linux
  * baml-0.90.2-arm64-darwin  ← Exists, but Bundler won't use it
  * baml-0.90.2-x86_64-linux
  * baml-0.90.2-x86_64-linux-musl

Root Cause

The gem is published as baml-0.90.2-arm64-darwin (generic darwin), but:

1. macOS 15 identifies as arm64-darwin-24 (darwin version 24)
2. Bundler tries to resolve for both arm64-darwin AND arm64-darwin-24 simultaneously
3. Since no arm64-darwin-24 variant exists, resolution fails
4. The ruby platform is also added to PLATFORMS, which doesn't have a baml gem variant

Workaround That Works

# 1. Manually edit Gemfile.lock to keep only arm64-darwin platform
sed -i '' '/PLATFORMS/,/^$/{/^  ruby$/d; /^  arm64-darwin-24$/d;}' Gemfile.lock
sed -i '' 's/^PLATFORMS$/PLATFORMS\n  arm64-darwin/' Gemfile.lock

# 2. Add baml to Gemfile
echo 'gem "baml"' >> Gemfile

# 3. Install (now Bundler only resolves for arm64-darwin)
bundle install

Result: Successfully installed baml-0.90.2-arm64-darwin

Additional Observation

After successful installation, the gem produces constant redefinition warnings at runtime:

warning: already initialized constant Baml::StreamState
/vendor/bundle/ruby/3.4.0/gems/baml-0.90.2-arm64-darwin/lib/baml.rb:23
previous definition of StreamState was here
/vendor/bundle/ruby/3.4.0/gems/baml-0.90.2-arm64-darwin/lib/stream.rb:18

This suggests baml.rb and stream.rb both define the same constant.

Impact

This affects:

• macOS 15 (darwin-24) users on arm64 - Cannot install via standard bundle add
• x86_64 Mac users on versions > 0.54.0 - Cannot install at all (per original report)
• Multi-platform projects - Resolution fails when Gemfile.lock has multiple platforms
• CI/CD pipelines - May fail if using newer macOS runners

The official Ruby installation docs show bundle add baml sorbet-runtime which does not work for affected platforms.

Build Configuration Reference

.github/workflows/build-ruby-release.reusable.yaml currently builds:

• arm64-darwin (generic, no version suffix)
• x86_64-darwin (last published: 0.54.0 per original report)
• Various Linux platforms

No version-specific darwin builds (darwin-22, darwin-23, darwin-24) are created.

[sxlijin]

Oh jeez, sorry for the radio silence on this. We'll try to take a look at this when we can: unfortunately the Ruby build has been having a lot of issues and is way behind on releases right now.