Codex CLI fails to build with OpenSSL 4.0
Open 💬 0 comments Opened Jul 25, 2026 by loqs
Codex CLI Version
codex HEAD https://github.com/openai/codex/commit/20dafe201d91d4405eef05ecd1db0257f13a9ac8
System information
Arch Linux Rolling
Describe the bug
Codex CLI fails to build against OpenSSL 4.0.
Additional information
Steps to reproduce:
$ git clone https://github.com/openai/codex.git
$ cd codex/codex-rs
$ cargo build --bin codex --bin codex-code-mode-host --bin codex-responses-api-proxy
....
--- stderr
thread 'main' (4644) panicked at /build/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/openssl-sys-0.9.111/build/main.rs:472:5:
This crate is only compatible with OpenSSL (version 1.0.2 through 1.1.1, or 3), or LibreSSL 3.5
through 4.2.x, but a different version of OpenSSL was found. The build is now aborting
due to this version mismatch.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...@orhun @pierres