# FASTBuild generator creates superfluous directories

**URL:** https://discourse.cmake.org/t/fastbuild-generator-creates-superfluous-directories/15274
**Category:** Development
**Created:** [October 28, 2025, 5:55pm UTC](https://discourse.cmake.org/t/fastbuild-generator-creates-superfluous-directories/15274 "2025-10-28T17:55:15Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![objectx](https://discourse.cmake.org/user_avatar/discourse.cmake.org/objectx/32/1067_2.png) [@objectx](https://discourse.cmake.org/u/objectx)
#### Post date: [October 28, 2025, 5:55pm UTC](https://discourse.cmake.org/t/fastbuild-generator-creates-superfluous-directories/15274/1 "2025-10-28T17:55:15Z")

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I’ve cloned the CMake sources using a `scalar clone`. All the sources are in the`src` sub-directory.

Running CMake with the command `cmake -G FASTBuild -S src -G 1.B` creates unwanted directories as following

 ![image](https://discourse.cmake.org/uploads/default/original/2X/8/85ac8dcd3bd0ecd2a000ec4cfeab412e9891c1c5.jpeg)

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### Author: ![Eduard\_Voronkin](https://discourse.cmake.org/user_avatar/discourse.cmake.org/eduard_voronkin/32/5873_2.png) [@Eduard\_Voronkin](https://discourse.cmake.org/u/Eduard_Voronkin)
#### Post date: [November 2, 2025, 3:47am UTC](https://discourse.cmake.org/t/fastbuild-generator-creates-superfluous-directories/15274/2 "2025-11-02T03:47:09Z")

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Thanks for trying out the generator!  
I’ve created MR with the fix: [https://gitlab.kitware.com/cmake/cmake/-/merge\_requests/11379](https://gitlab.kitware.com/cmake/cmake/-/merge_requests/11379)