diff --git a/packaging/arch/PKGBUILD b/packaging/arch/PKGBUILD
index e71dfdb..b6078f3 100644
--- a/packaging/arch/PKGBUILD
+++ b/packaging/arch/PKGBUILD
@@ -7,6 +7,10 @@ pkgdesc="Package manager for the bread ecosystem"
 arch=('x86_64')
 url="https://github.com/Breadway/bread-ecosystem"
 license=('MIT')
+# Some Rust deps (ring/mlua) build vendored C/asm into static archives; makepkg's
+# default -flto=auto emits GCC LTO bitcode the Rust (lld) link cannot read,
+# causing undefined-symbol errors. Disable LTO.
+options=(!lto)
 depends=('glibc' 'gcc-libs')
 makedepends=('rust' 'cargo')
 source=("${pkgname}-${pkgver}.tar.gz")