It looks like the cryptography package now requires Rust. This isn't available in the ppc64le travis build architecture. Here is a relevant PR.
There seem to be a couple of routes here. The easy way looks like to explicitly install Rust and update pip, but I suppose you can also set the variable in the Build config.
Example Failed Travis Link
It looks like the cryptography package now requires Rust. This isn't available in the ppc64le travis build architecture. Here is a relevant PR.
There seem to be a couple of routes here. The easy way looks like to explicitly install Rust and update pip, but I suppose you can also set the variable in the Build config.