`hatch build` no longer finds dependencies for build hook

[unflxw]

We have a custom build hook defined as:

[tool.hatch.build.targets.wheel.hooks.custom]
path = "src/scripts/build_hook.py"
dependencies = ["requests"]

The build_hook.py file imports requests as part of its behaviour.

This worked fine when running hatch build -t wheel on Hatch 1.15.1 and Hatchling 1.27.0 (CI link) but fails on Hatch 1.16.2 and Hatchling 1.28.0 (CI link) with the following error:

Full traceback from CI job

app-1    | Traceback (most recent call last):
app-1    |   File "<frozen runpy>", line 198, in _run_module_as_main
app-1    |   File "<frozen runpy>", line 88, in _run_code
app-1    |   File "/root/.local/share/hatch/env/virtual/appsignal/6Y_oALkB/hatch-build/lib/python3.11/site-packages/hatchling/__main__.py", line 6, in <module>
app-1    |     sys.exit(hatchling())
app-1    |              ^^^^^^^^^^^
app-1    |   File "/root/.local/share/hatch/env/virtual/appsignal/6Y_oALkB/hatch-build/lib/python3.11/site-packages/hatchling/cli/__init__.py", line 26, in hatchling
app-1    |     command(**kwargs)
app-1    |   File "/root/.local/share/hatch/env/virtual/appsignal/6Y_oALkB/hatch-build/lib/python3.11/site-packages/hatchling/cli/build/__init__.py", line 82, in build_impl
app-1    |     for artifact in builder.build(
app-1    |   File "/root/.local/share/hatch/env/virtual/appsignal/6Y_oALkB/hatch-build/lib/python3.11/site-packages/hatchling/builders/plugin/interface.py", line 118, in build
app-1    |     configured_build_hooks = self.get_build_hooks(directory)
app-1    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1    |   File "/root/.local/share/hatch/env/virtual/appsignal/6Y_oALkB/hatch-build/lib/python3.11/site-packages/hatchling/builders/plugin/interface.py", line 390, in get_build_hooks
app-1    |     configured_build_hooks[hook_name] = build_hook(
app-1    |                                         ^^^^^^^^^^^
app-1    |   File "/root/.local/share/hatch/env/virtual/appsignal/6Y_oALkB/hatch-build/lib/python3.11/site-packages/hatchling/builders/hooks/custom.py", line 35, in __new__
app-1    |     hook_class = load_plugin_from_script(path, build_script, BuildHookInterface, "build_hook")
app-1    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1    |   File "/root/.local/share/hatch/env/virtual/appsignal/6Y_oALkB/hatch-build/lib/python3.11/site-packages/hatchling/plugin/utils.py", line 18, in load_plugin_from_script
app-1    |     spec.loader.exec_module(module)  # type: ignore[union-attr]
app-1    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app-1    |   File "<frozen importlib._bootstrap_external>", line 940, in exec_module
app-1    |   File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
app-1    |   File "/integration/src/scripts/build_hook.py", line 13, in <module>
app-1    |     import requests
app-1    | ModuleNotFoundError: No module named 'requests'

Comparing the two CI runs, it seems that it now creates an environment named hatch-build to run the build hook in, rather than the build environment it used before. Adding the following (as suggested in #2113 (comment)) fixed the issue locally:

[tool.hatch.envs.build]
builder = true

However, on our CI environments, we also needed to, in addition to specifying requests as a dependency for the build hook, do so for the hatch-build environment as well.