Optical/Mid infrared (MIR) interferometry from space has been a long discussed and highly anticipated technique in high angular resolution astrophysics, in particular for the detection and characterisation of Earth-like exoplanets. However, in the past there have been two large obstacles in pursuing a large-scale space mission with this mandate: a lack of understanding of planet demographics (that is, how many Earth-like exoplanets may be detected), and a lack of technological readiness. With missions such as Kepler and TESS over the past decade, we now have substantial information to create detailed estimates of such an exoplanet yield; and as such new initiatives for space interferometry, such as the Large Interferometer For Exoplanets (LIFE), have made substantial progress in rejuvenating interest. Critically though, as noted by the European Space Agency’s Voyage 2050 plan, there is still a need for smaller scale technology demonstrators to prove the technology required; in particular that of sufficiently stable formation-flight, and cryogenic nulling beam combination. In this paper, we discuss the Pyxis interferometer: an autonomous, three-platform ground-based pathfinder for a set of CubeSat satellites designed to test formation-flying interferometry, utilising a precise, three stage metrology system, and currently being built at Mt Stromlo Observatory at the Australian National University. We will show the current status and progress of the mechanical and optical systems involved, including a preliminary demonstration of one of the robotic platforms and a look at the critical metrology and beam combination systems. We will also provide a look towards the future of the next version of Pyxis: the constellation of three CubeSats that we anticipate will demonstrate that a large scale optical/MIR space interferometer, such as LIFE, will be feasible in the years to come.