| <p><code>List of <a href="../build-ref.html#labels">labels</a>; optional</code></p> | |
| <p> | |
| The list of environments this rule can be built for, <i>instead</i> of | |
| default-supported environments. | |
| </p> | |
| <p> | |
| This is part of Bazel's soft-launched constraint system. See | |
| <code><a href="#common.compatible_with">compatible_with</a></code> | |
| for details. | |
| </p> |