This is an unmodified distribution of MUMmer 4.0.0rc1, compiled from source using the commands:

./configure --disable-shared --enable-static --prefix=<directory>
make
make install

Only selected MUMmer binaries are included in this distribution.

Full source code is available here:
https://github.com/mummer4/mummer/releases/download/v4.0.0rc1/mummer-4.0.0rc1.tar.gz
