  We study (orientifolded) toric Calabi-Yau singularities in search for D-brane
configurations which lead to dynamical supersymmetry breaking at low energy. By
exploiting dimer techniques we are able to determine that while most
realizations lead to a Coulomb branch instability, a rather specific
construction admits a fully stable supersymmetry breaking vacuum. We describe
the geometric structure that a singularity should have in order to host such a
construction, and present its simplest example, the Octagon.
