  We construct an ${\cal N}{=}\,2$ supersymmetric extension of $n$-particle
Ruijsenaars-Schneider models. The guiding feature is a deformation of the phase
space. The supercharges have a "free" form linear in the fermions but produce
an interacting four-fermion Hamiltonian. A field-dependent unitary
transformation maps to standard fermions obeying conventional Poisson brackets.
In this frame, the supercharges and Hamiltonian have long "fermionic tails". We
also comment on previous attempts in this direction.
