--- teams-1.3.00.5153.ebuild	2020-07-05 18:51:29.473338341 -0600
+++ teams-1.3.00.5153.ebuild	2020-07-08 22:12:41.531515764 -0600
@@ -13,7 +13,7 @@ 
 SLOT="0"
 KEYWORDS="-* ~amd64"
 RESTRICT="bindist mirror splitdebug test"
-IUSE=""
+IUSE="-system-ffmpeg"
 
 QA_PREBUILT="*"
 
@@ -34,7 +34,7 @@ 
 	media-libs/alsa-lib
 	media-libs/fontconfig
 	media-libs/mesa
-	media-video/ffmpeg[chromium]
+	system-ffmpeg? ( media-video/ffmpeg[chromium] )
 	net-print/cups
 	sys-apps/dbus
 	sys-apps/util-linux
@@ -67,8 +67,9 @@ 
 	fperms +x /usr/bin/teams
 	fperms +x /usr/share/teams/teams
 
-	# use system ffmpeg
-	rm -f "${D}"/usr/share/teams/libffmpeg.so || die
+	if use system-ffmpeg; then
+		rm -f "${D}"/usr/share/teams/libffmpeg.so || die
+	fi
 
 	cat > 99teams <<-EOF
 		LDPATH=${EROOT}/usr/$(get_libdir)/chromium