There are a number of tools and scripts which assume the presence of the GZip -l argument to list the compressed file's contents, namely XArchiver and other archivers which work with system-present archivers. I reproduced the behavior on Alpine Linux Edge (v3.15.x) with Busybox v1.35.0 and XArchiver 0.5.4.17. GNU GZip documentation: https://www.gnu.org/software/gzip/manual/gzip.html#Sample Bug filed downstream with XArchiver: https://github.com/ib/xarchiver/issues/144