Alberto Alaniz, Jr., federal prisoner # 08779-045, appeals the district court’s dismissal of his 28 U.S.C. § 2241 petition in which he challenged his 240-month sentence for conspiracy to distribute marijuana. The district court determined that Alaniz could not proceed under § 2241 because his claims did not satisfy the requirements of the “savings clause” of 28 U.S.C. § 2255(e).

Alaniz’s brief is entirely devoted to the merits of his claims for relief. Alaniz has not argued, much less shown, that he is entitled to proceed under § 2241 based on the savings clause of § 2255(e). See Reyes-Requena v. United States, 243 F.3d 893, 900-01, 904 (5th Cir. 2001). Alaniz has waived the issue by failing to brief it. See Yohey v. Collins, 985 F.2d 222, 224-25 (5th Cir. 1993); Brinkmann v. Dallas County Deputy Sheriff Abner, 813 F.2d 744, 748 (5th Cir. 1987).

The judgment of the district court is AFFIRMED.