gentoo-overlay/dev-haskell/lua/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>haskell@gentoo.org</email>
		<name>Gentoo Haskell</name>
	</maintainer>
	<use>
		<flag name="system-lua">Use @pkg-config@ to discover library and include paths.
Setting this flag implies `pkg-config`.</flag>
	</use>
</pkgmetadata>