# \`CMAKE\_PROJECT\_TOP\_LEVEL\_INCLUDES\` and \`CMAKE\_TOOLCHAIN\_FILE\`

**URL:** https://discourse.cmake.org/t/cmake-project-top-level-includes-and-cmake-toolchain-file/15463
**Category:** Usage
**Created:** [January 16, 2026, 8:50pm UTC](https://discourse.cmake.org/t/cmake-project-top-level-includes-and-cmake-toolchain-file/15463 "2026-01-16T20:50:04Z")
**Posts on this page:** 1
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### Author: ![ben.boeckel](https://discourse.cmake.org/letter_avatar_proxy/v4/letter/b/ea5d25/32.png) [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [February 9, 2026, 2:22am UTC](https://discourse.cmake.org/t/cmake-project-top-level-includes-and-cmake-toolchain-file/15463/2 "2026-02-09T02:22:31Z")

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Could Conan provide a bootstrap toolchain file that downloads it if not yet done and just includes it if so?

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_[View the full topic](https://discourse.cmake.org/t/cmake-project-top-level-includes-and-cmake-toolchain-file/15463)._