  We provide a detailed analysis of the dynamics of moduli fields in the KKLT
scenario coupled to a Polonyi field, which plays the role of a hidden matter
sector field. It was previously shown that such matter fields can uplift AdS
vacua to Minkowski or de Sitter vacua. Additionally, we take a background fluid
into account (which can be either matter or radiation), which aids moduli
stabilisation. Our analysis shows that the presence of the matter field further
aids stabilisation, due to a new scaling regime. We study the system both
analytically and numerically.
