It's used only as a dev dependency in 8 crates.

Depender (with downloads and own rev deps) pire-dev version
260 7 pire-base dev ^0.1.0
170 pire-gemm-f16 dev ^0.1.0
170 pire-gemm-f64 dev ^0.1.0
170 pire-gemm-c32 dev ^0.1.0
170 pire-gemm-s16s16s32 dev ^0.1.0
170 pire-gemm-c64 dev ^0.1.0
170 pire-gemm-f32 dev ^0.1.0
170 pire-gemm-s8u8s32 dev ^0.1.0