internal_variables…

.dir-locals.el
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			;;((nil . ((cmake-ide-build-dir . "build"))))
			;;; Directory Local Variables
			;;; For more information see (info "(emacs) Directory Variables")

			((nil . ((eval .
			(setq cmake-ide-build-dir
			(concat
			(locate-dominating-file
			default-directory
			dir-locals-file)
			"build"))))))