I tried fixing the crate imports, I tried using feature flags, I tried
moving the custom 'build to after 'install. I didn't try upgrading to a
newer version of rust-cargo-c.

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted