[rsynccp] Illegal option on macOS

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Environment details (Put x in the checkbox along with the information)

• Operating System: macOS 12.1
• Desktop Environment:
• Terminal Emulator: kitty
• Shell: zsh
• Custom desktop opener (if applicable):
• Program options used:
• Configuration options set:
• Plugins are installed: rsynccp
• Issue exists on nnn master

Exact steps to reproduce the issue

When I install rsynccp and try to copy and paste a file within nnn I get following error message:

❯ nnn
xargs: illegal option -- a
usage: xargs [-0opt] [-E eofstr] [-I replstr [-R replacements] [-S replsize]]
             [-J replstr] [-L number] [-n number [-x]] [-P maxprocs]
             [-s size] [utility [argument ...]]
xargs: illegal option -- a
usage: xargs [-0opt] [-E eofstr] [-I replstr [-R replacements] [-S replsize]]
             [-J replstr] [-L number] [-n number [-x]] [-P maxprocs]
             [-s size] [utility [argument ...]]
xargs: illegal option -- a
usage: xargs [-0opt] [-E eofstr] [-I replstr [-R replacements] [-S replsize]]
             [-J replstr] [-L number] [-n number [-x]] [-P maxprocs]
             [-s size] [utility [argument ...]]
xargs: illegal option -- a
usage: xargs [-0opt] [-E eofstr] [-I replstr [-R replacements] [-S replsize]]
             [-J replstr] [-L number] [-n number [-x]] [-P maxprocs]
             [-s size] [utility [argument ...]]

It seems that macOS has a different xargs version that does not understand the option --a