  We derive the nuclear dependence coefficient $\alpha(q_T)$ for Drell-Yan and
J/$\psi$ production. We show that at small $q_T$, the $\alpha(q_T)$ is given by
an universal functional form: $\alpha(q_T)=a+b q_T^2$, and the parameters $a$
and $b$ are completely determined by either perturbatively calculable or
independently measurable quantities. This universal functional form
$\alpha(q_T)$ is insensitive to the $A$, and is consistent with existing data.
