libmount is used at run time in 5 crates (of which 2 optionally). It's used only as a dev dependency in 3 crates.

Depender (with downloads and own rev deps) libmount version
10K sccache optional ^0.1.15
130 garbage ^0.1.15
lithos ^0.1.10
550 stratisd optional ^0.1.9
libstratis ^0.1.9
7.6K 2 devicemapper dev ^0.1.11
1 btrfsutil-fake dev ^0.1.11
btrfsutil dev ^0.1.11