lix/src/libstore/settings/run-diff-hook.md

name, internalName, type, default

name	internalName	type	default
run-diff-hook	runDiffHook	bool	false

If true, enable the execution of the diff-hook program.

When using the Nix daemon, run-diff-hook must be set in the nix.conf configuration file, and cannot be passed at the command line.