Capitalism is not compatible with forced labor. It may be compatible with slavery if you define slavery in a way that includes consensual labor. Systems that are partly capitalist may be compatible with forced labor, but in this case the part that allows the forced labor is not the capitalist part of the system and the blame should rest on the system not being capitalist enough.

For example, Resolution No. 9855 in Venezuela allows the government to force workers to move from their current jobs to work in farm fields or elsewhere in the agricultural sector for periods of 60 days. That is forced labor. But it is not to be blamed on capitalism; in fact, it would have been prevented by capitalism.