  The $Z'$-portal is one of most popular and well-explored scenarios of dark
matter (DM). To avoid the strong constraints coming from dilepton resonance
searches at the LHC and direct detection of DM, it is usually required that in
addition to being leptophobic, the $Z'$ is axially coupled to either the
(fermionic) DM or the standard model (SM) quarks. The first possibility has
been extensively studied both in the context of simplified model and UV
complete scenarios. However, the studies on the second possibiliy are largely
confined to simplified models only. Here, we construct the minimal UV
completion of these models satisfying both the criteria of leptophobia and
purely axial $Z'-$quark coupling. The anomaly cancellation conditions demand
highly non-trivial structures, not only in the dark sector, but also in the
Higgs sector.
