spinning is used at run time in 5 crates (of which 2 optionally).

Depender (with downloads and own rev deps) spinning version
7.4K 2 interprocess-docfix optional ^0.1
280 enarx-shim-kvm ^0.1
280 enarx-shim-sgx ^0.1
enarx_test_011 ^0.1.0
redox-buffer-pool optional ^0.1