I see that Servo also uses https://s3.amazonaws.com/rust-lang-ci/rust-ci-mirror/openssl-${OPENSSL_VERSION}.tar.gz when building for android. How ephemeral are these URLs?
Edit: https://s3.amazonaws.com/rust-lang-ci2/rust-ci-mirror/openssl-1.0.2k.tar.gz responds with HTTP/1.1 301 Moved Permanently but no Location header. I’ll leave that one in the old bucket for now.
Edit 2: https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/openssl-1.0.2k.tar.gz works