# 5.103. Release Notes for Buildbot 0.9.0b2

The following are the release notes for Buildbot 0.9.0b2. Buildbot 0.9.0b2 was released on August, 2 2015.

## 5.103.1. Master

### 5.103.1.1. Features

- Mercurial hook was updated and modernized. It is no longer necessary to fork. One can now extend PYTHONPATH via the hook configuration. Among others, it permits to use a buildbot virtualenv instead of installing buildbot in all the system. Added documentation inside the hook. Misc. clean-up and reorganization in order to make the code a bit more readable.

- UI templates can now be customizable. You can provide html or jade overrides to the www plugins, to customize the UI

- UI side bar is now fixed by default for large screens.

### 5.103.1.2. Fixes

- Fix setup for missing www.hooks module

- Fix setup to install only on recents version of pip (>=1.4). This prevents unexpected upgrade to nine from people who just use `pip install -U buildbot`

- Fix a crash in the git hook.

- Add checks to enforce slavenames are identifiers.

### 5.103.1.3. Deprecations, Removals, and Non-Compatible Changes

### 5.103.1.4. Changes for Developers

- The `BuilderConfig` `nextSlave` keyword argument takes a callable. This callable now receives `BuildRequest` instance in its signature as 3rd parameter. For retro-compatibility, all callable taking only 2 parameters will still work.

- Data api provides a way to query the build list per slave.

- Data api provides a way to query some build properties in a build list.

## 5.103.2. Slave

- `buildbot-slave` now requires Python 2.6

### 5.103.2.1. Features

- Schedulers: the `codebases` parameter can now be specified in a simple list-of-strings form.

### 5.103.2.2. Fixes

- Fix two race conditions in the integration tests

### 5.103.2.3. Deprecations, Removals, and Non-Compatible Changes

- Providing Latent AWS EC2 credentials by the `.ec2/aws_id` file is deprecated: Use the standard `.aws/credentials` file, instead.

## 5.103.3. Details

For a more detailed description of the changes made in this version, see the git log itself:

    git log v0.9.0b1..v0.9.0b2