io_tee is used at run time in 40 crates (of which 6 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 2 crates (of which 1 directly).

Depender (with downloads and own rev deps) io_tee version
15K 8 age-core ^0.1.1
170 2 nassun ^0.1.1
livemod-gui optional ^0.1.0
scarb dev ^0.1.1