/usr/mipsisa64r6el-linux-gnuabin32/lib/libnsl.so.1 is in libc6-mipsn32r6el-cross 2.27-3ubuntu1cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/mipsisa64r6el-linux-gnuabin32/lib/libnsl-2.27.so