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This hook can be used to set system-specific per-derivation build settings that don't fit into the derivation model and are too complex or volatile to be hard-coded into nix. Currently, the pre-build hook can only add chroot dirs/files through the interface, but it also has full access to the chroot root. The specific use case for this is systems where the operating system ABI is more complex than just the kernel-support system calls. For example, on OS X there is a set of system-provided frameworks that can reliably be accessed by any program linked to them, no matter the version the program is running on. Unfortunately, those frameworks do not necessarily live in the same locations on each version of OS X, nor do their dependencies, and thus nix needs to know the specific version of OS X currently running in order to make those frameworks available. The pre-build hook is a perfect mechanism for doing just that. |
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| .. | ||
| advanced-topics | ||
| command-ref | ||
| expressions | ||
| figures | ||
| glossary | ||
| images/callouts | ||
| installation | ||
| introduction | ||
| packages | ||
| release-notes | ||
| troubleshooting | ||
| hacking.xml | ||
| local.mk | ||
| manual.xml | ||
| nix-lang-ref.xml | ||
| quote-literals.xsl | ||
| schemas.xml | ||
| style.css | ||