# Special build helpers {#chap-special}

This chapter describes several special build helpers.

```{=include=} sections
special/buildenv.section.md
special/fakenss.section.md
special/fhs-environments.section.md
special/makesetuphook.section.md
special/mkshell.section.md
special/vm-tools.section.md
special/checkpoint-build.section.md
```