hi

$ man ungoogled-chromium | grep @@PACKAGE
@@PACKAGE(1)                  USER COMMANDS                 @@PACKAGE(1)
	@@PACKAGE - the web browser from Google
		invocations of @@PACKAGE will reuse an existing process for a
                                                            @@PACKAGE(1)

$ man ungoogled-chromium | grep @@MENUNAME
@@MENUNAME has hundreds of undocumented command-line flags that are added
	@@MENUNAME must use separate user data directories; repeated
As a GTK+ app, @@MENUNAME also obeys GTK+ command-line flags, such as
@@MENUNAME obeys the following environment variables:

$ grep -A1 -E '\\@\\@(PACKAGE|MENUNAME)' Makefile
@perl -pi -e "s,\@\@PACKAGE\@\@,ungoogled-chromium,g;s,\@\@MENUNAME\@\@,Ungoogled Chromium Web Browser,g" \
	${PREFIX}/man/man1/ungoogled-chromium.1

nathanael