diff --git a/common.d/common.arch.sh b/common.d/common.arch.sh
new file mode 100644
index 0000000..0adc12f
--- /dev/null
+++ b/common.d/common.arch.sh
@@ -0,0 +1,158 @@
+#!/usr/bin/env bash
+source ./common.d/functions.sh
+source ./common.d/build_functions.sh
+
+require "wget"
+require "bsdtar"
+
+# shellcheck disable=SC2086
+fetch_base_system()
+{
+    local rootdir="$1"
+    local src="$2"
+    local filename="./cache/$(basename "${src%%\?*}")"
+
+    [ ! -d "$rootdir" ] && {
+        log "Rootdir [$rootdir] does not exists" ierror
+        return 2
+    }
+    
+    if [ ! -f "$filename" ]; then
+        log "Downloading rootfs tarball" internal
+        wget -O "$filename" "$src" || {
+            log "Failed to download rootfs tarball" ierror
+            return 1
+        }
+    fi
+
+    log "Extracting rootfs tarball" internal
+    bsdtar -xpf "$filename" -C "$rootdir" || {
+        log "Failed to extract rootfs tarball" error
+        return 1
+    }
+}
+
+prepare_system()
+{
+    local rootdir="$1"
+    [ ! -d "$rootdir" ] && {
+        log "Rootdir [$rootdir] does not exists" ierror
+        return 2
+    }
+    
+    log "Removing default kernel and settings" internal
+    chroot "$rootdir" userdel -r alarm
+    chroot "$rootdir" pacman -R linux-aarch64 linux-firmware --noconfirm || {
+        log "Failed to remove default kernel"
+    }
+
+    log "Adding mirrorlist" internal
+    cp ./drop/mirrorlist "$rootdir/etc/pacman.d/mirrorlist"
+    
+    log "Populating pacman key store" internal
+    {
+        chroot "$rootdir" pacman-key --init && chroot "$rootdir" pacman-key --populate archlinuxarm
+    } || {
+        log "Failed to populate pacman key store"
+    }
+    
+    log "Enable pacman parallel downloads" internal
+    chroot "$rootdir" sed -i "s/#ParallelDownloads/ParallelDownloads/g" /etc/pacman.conf
+
+    log "Update pacman keyrings" internal
+    chroot "$rootdir" pacman -Sy archlinux-keyring archlinuxarm-keyring --noconfirm || {
+        log "Failed to update pacman keyrings"
+    }
+}
+
+setup_zram_generator()
+{
+    local rootdir="$1"
+    [ ! -d "$rootdir" ] && {
+        log "Rootdir [$rootdir] does not exists" ierror
+        return 2
+    }
+    
+    log "Installing systemd-zram-generator" install
+    chroot "$rootdir" pacman -S zram-generator --noconfirm || {
+        log "Failed to install systemd-zram-generator" ierror
+        return 1
+    }
+
+    log "Configuring zram-generator" internal
+    cp ./drop/zram-generator.conf "$rootdir/etc/systemd/zram-generator.conf" || {
+        log "Failed to confugire zram-generator" ierror
+        return 1
+    }
+    
+    log "Enabling zram-generator" internal
+    chroot "$rootdir" systemctl enable systemd-zram-setup@zram0.service || {
+        log "Failed to enable zram-generator" ierror
+        return 1
+    }
+}
+
+install_nabu_packages()
+{
+    local rootdir="$1"
+    [ ! -d "$rootdir" ] && {
+        log "Rootdir [$rootdir] does not exists" ierror
+        return 2
+    }
+    
+    cp ./packages/*.zst "$rootdir/opt/"
+    chroot "$rootdir" bash -c "pacman -U /opt/*.zst --noconfirm" || {
+        log "Failed to install packages" ierror
+        return 1
+    }
+    chroot "$rootdir" bash -c "rm /opt/*.zst"
+
+    log "Enabling userspace services" internal
+    chroot "$rootdir" systemctl enable qrtr-ns pd-mapper tqftpserv rmtfs || {
+        log "Failed to enable services" ierror
+        return 1
+    }
+}
+
+# shellcheck disable=SC2086
+install_packages()
+{
+    local rootdir="$1"
+    local packages="${*:2}"
+    [ ! -d "$rootdir" ] && {
+        log "Rootdir [$rootdir] does not exists" ierror
+        return 2
+    }
+
+    chroot "$rootdir" pacman -S $packages --noconfirm || {
+        log "Failed to install package(s)" ierror
+        return 1
+    }
+}
+
+finish_system()
+{
+    local rootdir="$1"
+    [ ! -d "$rootdir" ] && {
+        log "Rootdir [$rootdir] does not exists" ierror
+        return 2
+    }
+    
+    log "Cleaning apt cache" internal
+    yes | chroot "$rootdir" pacman -Scc || {
+        log "Failed to clean apt cache" ierror
+        return 1
+    }
+    
+    log "Updating runtime linker bindings" internal
+    chroot "$rootdir" ldconfig || {
+        log "Failed to update runtime linker bindings" ierror
+        return 1
+    }
+
+    log "Restoring resolv.conf symlink"
+    mv "$rootdir/etc/resolv.conf.1" "$rootdir/etc/resolv.conf"
+
+    rm "$rootdir"/.* > /dev/null 2>&1
+}
+