diff --git a/dev-util/codex/codex-0.135.0.ebuild b/dev-util/codex/codex-0.135.0.ebuild
index d94d1917f2..6aa69863cc 100644
--- a/dev-util/codex/codex-0.135.0.ebuild
+++ b/dev-util/codex/codex-0.135.0.ebuild
@@ -140,6 +140,9 @@ src_compile() {
 	use amd64 && rusty_v8_triple=x86_64-unknown-linux-musl
 	use arm64 && rusty_v8_triple=aarch64-unknown-linux-musl
 
+	# codex-core trait resolution overflows rustc's default 8MiB stack
+	export RUST_MIN_STACK=16777216
+
 	RUSTY_V8_ARCHIVE="${DISTDIR}/rusty_v8_${RUSTY_V8_TAG}_librusty_v8_release_${rusty_v8_triple}.a.gz" \
 	RUSTY_V8_SRC_BINDING_PATH="${DISTDIR}/rusty_v8_${RUSTY_V8_TAG}_src_binding_release_${rusty_v8_triple}.rs" \
 		cargo_src_compile --package codex-cli