https://bugs.gentoo.org/956018#c3
--- a/library/portable-simd/crates/core_simd/src/masks/bitmask.rs
+++ b/library/portable-simd/crates/core_simd/src/masks/bitmask.rs
@@ -1,4 +1,5 @@
 #![allow(unused_imports)]
+#![allow(unused_attributes)]
 use super::MaskElement;
 use crate::simd::{LaneCount, Simd, SupportedLaneCount};
 use core::marker::PhantomData;