Possibly NNCP package already exists for your distribution:

NNCP should run on any POSIX-compatible operating system.

NNCP is written on Go programming language and you have to install Go compiler (1.10+ version is highly recommended). Make (BSD and GNU ones are fine) is recommended for convenient building. Texinfo is used for building documentation.

In general you must get the tarball, check its integrity and authenticity and run make. Look for general and platform-specific installation instructions.