  We study ${\cal N}=1$ supergravity with $N>1$ chiral superfields in which one
of the fields has a K\"ahler potential of exact no-scale type. Such systems
admit de Sitter (dS) solutions in which supersymmetry is predominantly broken
by the no-scale field, with only a small contribution to the breaking coming
from the other fields. Metastable dS vacua of this type were recently shown to
be achievable by the finetuning of an $N\times N$ sub-matrix of the Hessian
matrix at the critical point. We show that perturbatively small deformations of
the no-scale Minkowski vacuum into dS are only possible when the spectrum of
the no-scale vacuum, besides the no-scale field, contain an additional massless
mode. The no-scale structure allows for a decoupling of $N-2$ fields, and
metastability can be achieved by the tuning of ${\cal O}(N^0)$ parameters. We
illustrate this scenario in several examples, and derive a geometric condition
for its realisation in type IIB string theory. Supergravities in which the
complex structure moduli space is a symmetric space, such as the string theory
inspired STU-models, are non-generic and realise a modified version of the
scenario. For the STU-model with a single non-perturbative correction we
present an explicit analytic family of dS solutions that includes examples with
quantised fluxes satisfying the O3-plane tadpole condition.
