  We revisit the work by Volkov and Soroka on spontaneously broken local
supersymmetry. It is demonstrated for the first time that, for specially chosen
parameters of the theory, the Volkov-Soroka action is invariant under two
different local supersymmetries. One of them is present for arbitrary values of
the parameters and acts on the Goldstino, while the other supersymmetry emerges
only in a special case and leaves the Goldstino invariant. The former can be
used to gauge away the Goldstino, and then the resulting action coincides with
that proposed by Deser and Zumino for consistent supergravity in the
first-order formalism. In this sense, pure $\mathcal{N} = 1$ supergravity is a
special case of the Volkov-Soroka theory, although it was not discovered by
these authors. We also explain how the Volkov-Soroka approach allows one to
naturally arrive at the 1.5 formalism. Our analysis provides a nonlinear
realisation approach to construct unbroken $\mathcal{N} = 1$ Poincar\'e
supergravity.
