mv -t is not supported in busybox

crtmpserver/Makefile

 package:
 	rm -rf out
 	mkdir -p out/opt/cppse/build/crtmpserver/lib
-	mv -t out/opt/cppse/build/crtmpserver/lib/ \
-		crtmpserver/libcrtmpserver.a \
-		applications/appselector/libappselector.a \
-		applications/flvplayback/libflvplayback.a \
-		thelib/libthelib.a \
-		common/libcommon.a \
-		tinyxml/libtinyxml.a \
-		lua/liblua.a
+	mv crtmpserver/libcrtmpserver.a \
+	   applications/appselector/libappselector.a \
+	   applications/flvplayback/libflvplayback.a \
+	   thelib/libthelib.a \
+	   common/libcommon.a \
+	   tinyxml/libtinyxml.a \
+	   lua/liblua.a \
+	   out/opt/cppse/build/crtmpserver/lib/  # last is DEST
 	rm -rf crtmpserver_1.0_amd64.deb
 	docker run -v "$$(pwd):/src/" rayburgemeestre/fpm-ubuntu:18.04 fpm -s dir -t deb -n crtmpserver --license MPL2 --maintainer "Ray Burgemeestre <ray@cppse.nl>" --description "crtmpserver - build dependency" --url "https://github.com/rayburgemeestre/crtmpserver" --deb-generate-changes -C /src/out