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	diff --git a/documentation/content/en/books/porters-handbook/uses/_index.adoc b/documentation/content/en/books/porters-handbook/uses/_index.adoc
	--- a/documentation/content/en/books/porters-handbook/uses/_index.adoc
	+++ b/documentation/content/en/books/porters-handbook/uses/_index.adoc
	@@ -425,6 +425,29 @@

	The format of `featurelist` is described in man:elfctl[1]. The file paths are relative to ${BUILD_WRKSRC}.

	+[[uses-erlang]]
	+== `erlang`
	+
	+Possible arguments: (none), `enc`, `rebar`, `rebar3`
	+
	+Adds a build and run time dependency on package:lang/erlang[].
	+Depending on the argument, it adds additional build dependencies. `enc` adds a
	+dependency on package:devel/erlang-native-compiler[], `rebar` adds a dependency on
	+package:devel/rebar[] and `rebar3` adds a dependency on package:devel/rebar3[].
	+
	+In addition, the following variables are available to the port:
	+
	+* `ERL_APP_NAME`: Erlang app name as installed in Erlang's lib dir (minus version)
	+* `ERL_APP_ROOT`: Root directory for this Erlang app
	+* `REBAR_CMD`: Path to the "rebar" command
	+* `REBAR3_CMD`: Path to the "rebar3" command
	+* `REBAR_PROFILE`: Rebar profile
	+* `REBAR_TARGETS`: Rebar target list (usually compile, maybe escriptize)
	+* `ERL_BUILD_NAME`: Build name for rebar3
	+* `ERL_BUILD_DEPS`: List of BUILD_DEPENDS in category/portname format
	+* `ERL_RUN_DEPS`: List of RUN_DEPENDS in category/portname format
	+* `ERL_DOCS`: List of documentation files and directories
	+
	[[uses-fakeroot]]
	== `fakeroot`