### Bug Description All of the Python plugins create their virtual environments for the host architecture. While this isn't a problem if all packages are python-native, including a package with binary components will fail when doing a cross-compile. ### To Reproduce Try cross-compiling a snap with the parts specified below. It will succeed, but the snap won't have the correct cryptography package. ### part yaml ```shell parts: my-part: plugin: python source: . python-packages: - cryptography ``` ### Relevant log output ```shell n/a ```