We revisit the issue of moduli stabilization in a class of N=1 four
dimensional supergravity theories which are low energy descriptions of standard
perturbative heterotic string vacua compactified on Calabi-Yau spaces. In
particular, we show how it is possible to stabilize the universal dilaton and
Kahler moduli in a de Sitter/Minkowski vacuum with low energy supersymmetry
breaking by means of non-perturbative gauge dynamics, including recent results
by Intriligator, Seiberg and Shih. The non-SUSY vacua are meta-stable but
sufficiently long-lived.Comment: 1+31 pages, LaTeX, uses JHEP3 class, v2: references corrected and
added, version published in JHE
