/usr/bin/nqp-m is in nqp 2018.03+dfsg-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#!/bin/sh exec /usr/bin/moar --libpath=/usr/share/nqp/lib /usr/share/nqp/lib/nqp.moarvm "$@"