diff --git a/PKGBUILD b/PKGBUILD
index cc1f8d7..dece6d9 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -14,7 +14,8 @@ license=(MPL GPL LGPL)
 url="https://librewolf-community.gitlab.io/"
 depends=(gtk3 libxt mime-types dbus-glib ffmpeg nss ttf-font libpulse)
 makedepends=(unzip zip diffutils yasm mesa imake inetutils xorg-server-xvfb
-             autoconf2.13 rust clang llvm jack gtk2 nodejs cbindgen nasm
+             'rust<1:1.48.0' # rust 1.48.0 causes firefox / packed_simd building to fail
+             autoconf2.13 clang llvm jack gtk2 nodejs cbindgen nasm
              python-setuptools python-psutil python-zstandard git binutils lld)
 optdepends=('networkmanager: Location detection via available WiFi networks'
             'libnotify: Notification integration'
diff --git a/arch/01_build.sh b/arch/01_build.sh
index 90dbcb3..1faceaa 100755
--- a/arch/01_build.sh
+++ b/arch/01_build.sh
@@ -9,5 +9,7 @@ usermod -d /home/nobody nobody
 # we need to un-expire the account, otherwise PAM will complain
 usermod -e '' nobody
 chown -R nobody .
+# temporary workaround for rust / packed_simd build issue:
+pacman --noconfirm -U https://archive.archlinux.org/packages/r/rust/rust-1%3A1.47.0-4-x86_64.pkg.tar.zst
 # makepkg will not run as root
 sudo -u nobody -E -H makepkg --noconfirm --nosign --syncdeps --cleanbuild