So i had the 32bit binary version of NFSShell but i needed the 64bit version.

Compiling this was simple once I had the required dependencies.

12345root@kali:~/Downloads/nfsshell-master# apt-get install libreadline-dev libncurses5-dev root@kali:~/Downloads/nfsshell-master# make gcc -g -o nfsshell mount_clnt.o mount_xdr.o nfs_prot_clnt.o nfs_prot_xdr.o nfsshell.o -L/usr/local/lib -lreadline -lhistory -lncurses root@kali:~/Downloads/nfsshell-master# ./nfsshell nfs> quit

And for those that just want the binaries you can download them from here: nfsshell 32 bit nfsshell 64 bit