ORDER DISMISSING APPEAL
Because no statute or court rule permits an appeal from an order denying a motion for credit for time served, this court lacks jurisdiction to consider this appeal. Castillo v. State, 106 Nev. 349, 352, 792 P.2d 1133, 1135 (1990) (explaining that court has jurisdiction only when statute or court rule provides for appeal). Accordingly, this court ORDERS this appeal DISMISSED.
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FOOTNOTES
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. A claim for additional presentence credit is a challenge to the validity of the judgment of conviction and sentence and therefore must be raised in a postconviction petition for a writ of habeas corpus. See Griffin v. State, 122 Nev. 737, 744, 137 P.3d 1165, 1169 (2006). We express no opinion as to whether appellant could meet the procedural requirements of NRS Chapter 34.