Update build requirement from >=1.1.1 to >=1.6.1

[dependabot]

Updates the requirements on build to permit the latest version.

Release notes

Sourced from build's releases.

1.6.1

What's Changed

• chore[v1]: prepare for v1.6.1 by @​henryiii in pypa/build#1181

Full Changelog: pypa/build@1.6.0...1.6.1

Changelog

Sourced from build's changelog.

#################### 1.6.1 (2026-09-10) ####################

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Bugfixes

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• Avoid trying to detect symlinks on Windows, regression in 1.6.0 - by :user:henryiii (:issue:1175) (:issue:1175)

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Documentation

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• Fix doubled backslashes in the Windows pip config path (%APPDATA%\pip\pip.ini) in the docs - by :user:aroh3006 (:issue:1149)

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Miscellaneous

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• :issue:1168, :issue:1170, :issue:1178

#################### 1.6.0 (2026-08-27) ####################

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Features

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• Add --report=PATH to write a machine-readable JSON report of built artifacts; --metadata now also accepts .whl files - by :user:gaborbernat (:issue:198)
• The srcdir argument now accepts .tar.gz source distributions, extracting and building from them - by :user:gaborbernat (:issue:311)
• The "Unmet dependencies" error from --no-isolation builds now shows the wanted version, found version, and interpreter - by :user:gaborbernat (:issue:504)
• Add --sdist-extract-dir to extract the intermediate sdist into a persistent directory, enabling compiler cache reuse across rebuilds - by :user:gaborbernat (:issue:614)
• Add --env-dir to place the isolated build environment at a fixed path, enabling compiler cache reuse across builds
  • by :user:gaborbernat (:issue:655)
• Print a summary of resolved dependency versions (name==version) after installing them in isolated builds - by :user:gaborbernat (:issue:959)
• On build failure, print a tip pointing to --env-dir and --sdist-extract-dir for debugging and link to the "Debug a failed build" how-to - reported by :user:dimpase, implemented by :user:gaborbernat (:issue:966)

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Bugfixes

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... (truncated)

Commits

• 89cccef chore: prepare for 1.6.1
• a6f707a ci: support releases from v* branches (#1178)
• 7785161 docs: fix doubled backslashes in Windows pip config path (#1149)
• 244b250 fix: always use copies for the isolated venv on Windows (#1176)
• c93ca6f build(deps): bump re-actors/alls-green from 1.2.2 to 1.3.0 in the github-acti...
• e02ffd3 pre-commit: bump repositories (#1173)
• aad39a8 docs: fix changelog page heading levels and sidebar (#1171)
• 5c3fd46 docs: use PyPI ref directly (#1172)
• 1c5bd6c 🐛 fix(release): format generated changelog (#1170)
• 7f0cc7e 🔧 build(type): replace mypy with pyrefly (#1168)
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