On the README it says the following relating to static compiling OpenSSL: > `OPENSSL_STATIC` - If specified, OpenSSL libraries will be statically rather than dynamically linked. Passing this environment variable has no effect if `OPENSSL_LIB_DIR` and `OPENSSL_INCLUDE_DIR` are not specified.: https://github.com/naftulikay/rust-openssl-static-example/pull/