Given the poor prognosis and limited treatment options available for patients with mucosal or acral/lentiginous melanomas who develop metastatic disease, genetic discoveries of KIT mutations in these cancers present the need to test multi-targeted kinase inhibitors with potent KIT inhibitory activity in this patient population. Imatinib and other tyrosine kinase inhibitors (TKIs) have the potential to be effective in this patient population, but patients may develop resistance to treatment. Therefore, in this study, we propose to test nilotinib in patients with metastatic mucosal, acral, or chronically sun-damaged melanoma following treatment with another TKI.