diff --git a/customize.sh b/customize.sh
index 2cbab45..ce25c06 100755
--- a/customize.sh
+++ b/customize.sh
@@ -5,18 +5,6 @@
 
 O=$1
 
-emerge --root=/mnt/gentoo --config-root="${O}"/portage \
-    -kvnuUDj \
-    --rebuilt-binaries=y \
-    --onlydeps \
-    www-client/firefox
-
-set -x
-
-command -v clang
-command -v "${target}"-clang
-command -v "${target}"-clang-19
-
 passwd -R /mnt/gentoo -d root
 
 systemctl --root=/mnt/gentoo enable wpa_supplicant@wlan0
diff --git a/install.packages b/install.packages
index 31638b0..5c67a29 100644
--- a/install.packages
+++ b/install.packages
@@ -1 +1,2 @@
 net-wireless/wpa_supplicant
+www-client/firefox
diff --git a/portage/make.conf/wayland.conf b/portage/make.conf/wayland.conf
index 71d123e..624b840 100644
--- a/portage/make.conf/wayland.conf
+++ b/portage/make.conf/wayland.conf
@@ -1 +1 @@
-USE="${USE} -X wayland"
+USE="${USE} wayland"
diff --git a/portage/package.accept_keywords/firefox b/portage/package.accept_keywords/firefox
deleted file mode 100644
index f0cbd3b..0000000
--- a/portage/package.accept_keywords/firefox
+++ /dev/null
@@ -1 +0,0 @@
-dev-libs/nss ~amd64
diff --git a/portage/package.use/firefox b/portage/package.use/firefox
index 3580b88..d877364 100644
--- a/portage/package.use/firefox
+++ b/portage/package.use/firefox
@@ -2,5 +2,14 @@ media-libs/harfbuzz -cairo
 media-libs/libvpx postproc
 media-libs/mesa -llvm wayland
 media-video/ffmpeg openssl -gnutls
-www-client/firefox -telemetry dbus wayland
+
+# Must match USE flags of the www-client/firefox package on the
+# offical Gentoo binhost
+www-client/firefox X clang dbus gmp-autoupdate gnome-shell jumbo-build pulseaudio system-av1 system-harfbuzz system-icu system-jpeg system-libevent system-libvpx system-webp telemetry wayland LLVM_SLOT: 19 -17 -18
+x11-libs/cairo X
 x11-libs/gtk+ wayland
+media-libs/libglvnd X
+
+# Firefox requires a PulseAudio-compatible sound server; we use Pipewire
+media-video/pipewire sound-server
+media-libs/libcanberra udev alsa
diff --git a/prepare.sh b/prepare.sh
index 919d248..75c9fed 100644
--- a/prepare.sh
+++ b/prepare.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+. "${CONFIGDIR:=${PWD}}"/config
+
 if [ ! -f /var/db/repos/gentoo/metadata/timestamp ]; then
     emerge-webrsync
 fi
@@ -9,6 +11,7 @@ fi
 
 mkdir -p /etc/portage/package.use
 mkdir -p /etc/portage/make.conf
+echo 'virtual/libudev systemd' >> /etc/portage/package.use/systemd
 cp portage/package.use/firefox /etc/portage/package.use/
 cp portage/make.conf/introspection.conf /etc/portage/make.conf/
 cp portage/make.conf/wayland.conf /etc/portage/make.conf/
@@ -17,3 +20,7 @@ echo 'VIDEO_CARDS=""' > /etc/portage/make.conf/videocards.conf
 xargs -r emerge -vbknuUj --rebuilt-binaries=y --color=y <<EOF
 dev-libs/nss
 EOF
+
+[ -d /etc/portage/gnupg ] || getuto -v
+PORTAGE_BINHOST=https://distfiles.gentoo.org/releases/arm64/binpackages/23.0/arm64 \
+${target}-emerge -fvgK --nodeps www-client/firefox:esr