diff --git a/flake.lock b/flake.lock
index e0246ab..2272d3d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1749285348,
-        "narHash": "sha256-frdhQvPbmDYaScPFiCnfdh3B/Vh81Uuoo0w5TkWmmjU=",
+        "lastModified": 1742669843,
+        "narHash": "sha256-G5n+FOXLXcRx+3hCJ6Rt6ZQyF1zqQ0DL0sWAMn2Nk0w=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "3e3afe5174c561dee0df6f2c2b2236990146329f",
+        "rev": "1e5b653dff12029333a6546c11e108ede13052eb",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 884349e..15a9152 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,82 +15,162 @@
     flake-utils.lib.eachDefaultSystem (
       system:
       let
+        pkgs = import nixpkgs { inherit system; };
+        patosPkgs = self.packages.${system};
         version = "0.0.1";
         secureBoot = "false";
-        microcode = "intel";
+        cpuArch = "intel";
         updateUrl = "http://10.0.2.2:8000/";
-
-        overlay = import ./overlays { inherit version; };
-        pkgs = import nixpkgs { inherit system; overlays = [ overlay ]; };
-        pkgsCross = import nixpkgs {
-          inherit system;
-          overlays = [ overlay ];
-          crossSystem = {
-            config = "aarch64-unknown-linux-gnu";
-          };
-        };
       in
       {
         packages = {
-          default = self.packages.${system}.image;
-
-          image = pkgs.callPackage ./pkgs/image { inherit version updateUrl microcode secureBoot; };
-          image-aarch64 = pkgsCross.callPackage ./pkgs/image { inherit version updateUrl secureBoot; };
+          default = patosPkgs.image;
+          image = pkgs.callPackage ./pkgs/image {
+            inherit
+              patosPkgs
+              version
+              updateUrl
+              cpuArch
+              secureBoot
+              ;
+          };
+          rootfs = pkgs.callPackage ./pkgs/rootfs/mkrootfs.nix { inherit patosPkgs version; };
+          initrd = pkgs.callPackage ./pkgs/rootfs/mkinitrd.nix { inherit patosPkgs version; };
+          kernel = pkgs.callPackage ./pkgs/kernel { };
+          linux-firmware = pkgs.callPackage ./pkgs/linux-firmware { };
+          glibc = pkgs.callPackage ./pkgs/glibc { };
+          busybox = pkgs.callPackage ./pkgs/busybox { };
+          openssl = pkgs.callPackage ./pkgs/openssl { };
+          cert = pkgs.callPackage ./pkgs/cert { };
+          kexec = pkgs.callPackage ./pkgs/kexec-tools { };
+          lvm2 = pkgs.callPackage ./pkgs/lvm2 { };
+          tpm2-tools = pkgs.callPackage ./pkgs/tpm2-tools { inherit patosPkgs; };
+          tpm2-tss = pkgs.callPackage ./pkgs/tpm2-tss { };
+          systemd = pkgs.callPackage ./pkgs/systemd { };
+          dbus-broker = pkgs.callPackage ./pkgs/dbus-broker { };
 
           qemu-uefi-tpm = pkgs.callPackage ./utils/qemu-uefi-tpm.nix { };
-          qemu-aarch64-uefi-tpm = pkgs.callPackage ./utils/qemu-aarch64-uefi-tpm.nix { };
-
-          firewall-sysext = pkgs.callPackage ./lib/make-sysext.nix {
-            name = "firewall-tools";
-            version = "0.0.1";
-            packages = [
-              # network/firewalling
-              { drv = pkgs.iproute2; path = "bin/"; }
-              { drv = pkgs.nftables; path = "bin/"; }
-              { drv = pkgs.wireguard-tools; path = "bin/.wg-wrapped"; destpath = "bin/wg"; }
-              # deps
-              { drv = pkgs.nftables; path = "lib/"; }
-              { drv = pkgs.libnftnl; path = "lib/"; }
-              { drv = pkgs.iptables; path = "lib/"; }
-              { drv = pkgs.libgcc.lib; path = "lib/"; }
-              { drv = pkgs.libgcc; path = "lib/"; }
-              { drv = pkgs.libmnl; path = "lib/"; }
-              { drv = pkgs.gmp; path = "lib/"; }
-              { drv = pkgs.jansson.out; path = "lib/"; }
-              { drv = pkgs.ncurses.out; path = "lib/"; }
-              { drv = pkgs.libedit; path = "lib/"; }
-            ];
-          };
 
           debug-tools-sysext = pkgs.callPackage ./lib/make-sysext.nix {
             name = "debug-tools";
             version = "0.0.1";
             packages = [
-              { drv = pkgs.curl; path = "bin/"; }
-              { drv = pkgs.bash; path = "bin/"; }
-              { drv = pkgs.keyutils; path = "bin/"; }
-              { drv = pkgs.gnutar; path = "bin/"; }
-              { drv = pkgs.strace; path = "bin/"; }
-              { drv = pkgs.cryptsetup; path = "bin/"; }
-              { drv = pkgs.erofs-utils; path = "bin/"; }
-              { drv = pkgs.binutils-unwrapped; path = "bin/"; }
-              { drv = pkgs.binutils-unwrapped.lib; path = "lib/"; }
-              { drv = pkgs.util-linuxMinimal; path = "bin/"; }
-              { drv = pkgs.util-linuxMinimal.mount; path = "bin/"; }
-              { drv = pkgs.util-linuxMinimal.login; path = "bin/"; }
-              { drv = pkgs.util-linuxMinimal.swap; path = "bin/"; }
-              { drv = pkgs.patos.glibc; path = "bin/ldd"; }
-              { drv = pkgs.patos.tpm2-tools; path = "bin/tpm2"; }
-              { drv = pkgs.patos.openssl; path = "bin/openssl"; }
-              # shared lib required for mkfs.erofs
-              { drv = pkgs.lz4.lib; path = "lib/"; }
+              {
+                drv = pkgs.curl;
+                path = "bin/curl";
+              }
+              {
+                drv = pkgs.bash;
+                path = "bin/bash";
+              }
+              {
+                drv = patosPkgs.glibc;
+                path = "bin/ldd";
+              }
+              {
+                drv = pkgs.keyutils;
+                path = "bin/keyctl";
+              }
+              {
+                drv = pkgs.gnutar;
+                path = "bin/tar";
+              }
+              {
+                drv = pkgs.binutils-unwrapped;
+                path = "bin/strings";
+              }
+              {
+                drv = pkgs.strace;
+                path = "bin/strace";
+              }
+              {
+                drv = patosPkgs.tpm2-tools;
+                path = "bin/tpm2";
+              }
+              {
+                drv = patosPkgs.openssl;
+                path = "bin/openssl";
+              }
+              {
+                drv = pkgs.cryptsetup;
+                path = "bin/cryptsetup";
+              }
+              {
+                drv = pkgs.cryptsetup;
+                path = "bin/veritysetup";
+              }
+              {
+                drv = pkgs.erofs-utils;
+                path = "bin/mkfs.erofs";
+              }
               # shared lib required for cryptsetup
-              { drv = pkgs.popt; path = "lib/"; }
+              {
+                drv = pkgs.popt;
+                path = "lib/libpopt.so.0.0.2";
+              }
+              {
+                drv = pkgs.popt;
+                path = "lib/libpopt.so.0";
+              }
+              {
+                drv = pkgs.popt;
+                path = "lib/libpopt.so";
+              }
+              # shared lib required for mkfs.erofs
+              {
+                drv = pkgs.lz4.lib;
+                path = "lib/liblz4.so.1.10.0";
+              }
+              {
+                drv = pkgs.lz4.lib;
+                path = "lib/liblz4.so.1";
+              }
+              {
+                drv = pkgs.lz4.lib;
+                path = "lib/liblz4.so";
+              }
+              # shared lib required for binutils
+              {
+                drv = pkgs.binutils-unwrapped.lib;
+                path = "lib/libsframe.so.1.0.0";
+              }
+              {
+                drv = pkgs.binutils-unwrapped.lib;
+                path = "lib/libsframe.so.1";
+              }
+              {
+                drv = pkgs.binutils-unwrapped.lib;
+                path = "lib/libbfd-2.43.1.so";
+              }
+              {
+                drv = pkgs.binutils-unwrapped.lib;
+                path = "lib/libbfd.so";
+              }
               # shared lib required for strace
-              { drv = pkgs.elfutils.out; path = "lib/"; }
-              # shared lib required for bash
-              { drv = pkgs.readline.out; path = "lib/"; }
-              { drv = pkgs.ncurses.out; path = "lib/"; }
+              {
+                drv = pkgs.elfutils.out;
+                path = "lib/libdw-0.192.so";
+              }
+              {
+                drv = pkgs.elfutils.out;
+                path = "lib/libdw.so.1";
+              }
+              {
+                drv = pkgs.elfutils.out;
+                path = "lib/libdw.so";
+              }
+              {
+                drv = pkgs.elfutils.out;
+                path = "lib/libelf-0.192.so";
+              }
+              {
+                drv = pkgs.elfutils.out;
+                path = "lib/libelf.so.1";
+              }
+              {
+                drv = pkgs.elfutils.out;
+                path = "lib/libelf.so";
+              }
             ];
           };
         };
@@ -109,7 +189,7 @@
             just
             nixd
             nixfmt-rfc-style
-            self.packages.${system}.qemu-uefi-tpm
+            patosPkgs.qemu-uefi-tpm
           ];
         };
 
diff --git a/foo.sh b/foo.sh
new file mode 100755
index 0000000..aefb5d5
--- /dev/null
+++ b/foo.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+out=/tmp/build
+_pick() {
+  local p="$1" f d; shift
+  for f; do
+    d="$out/$p/${f#$out/}"
+    echo mkdir -p "$(dirname "$d")"
+    echo mv "$f" "$d"
+    echo rm -rf "$f"
+
+    echo mkfs.erofs --all-root -Efragments,dedupe,ztailpacking $out/$p.raw $p
+    echo veritysetup format --root-hash-file $out/$p.roothash $out/$p.raw $out/$p.verity
+  done
+}
+
+# _pick amd-ucode usr/lib/firmware/amd-ucode
+
+# _pick linux-firmware-nfp usr/lib/firmware/netronome
+# _pick linux-firmware-marvell usr/lib/firmware/{libertas,mwl8k,mwlwifi,mrvl}
+_pick linux-firmware-qlogic usr/lib/firmware/{qlogic,qed,ql2???_*,c{b,t,t2}fw-*}
+
+# _pick linux-firmware-base usr/lib/firmware
diff --git a/lib/make-sysext.nix b/lib/make-sysext.nix
index 70ed570..6de1e63 100644
--- a/lib/make-sysext.nix
+++ b/lib/make-sysext.nix
@@ -46,7 +46,6 @@ runCommand name
 
   }
   ''
-    set -ex -o pipefail
     do_copy () {
       local prefix="$1"
       local drv="$2"
@@ -61,25 +60,6 @@ runCommand name
       destdir="$(dirname -- "$destfile")"
 
       mkdir -pv "$destdir"
-
-      # recursively copy if ending with /
-      if [[ "$destfile" =~ /$ ]]; then
-        basedir="$(dirname -- "$destfile")"
-        chmod -R 755 "$basedir"
-        # remove if exists
-        for f in $srcfile/*; do
-          basename="$(basename -- "$f")"
-          rm -rf "$destfile/$basename"
-        done
-        cp -rPv "$srcfile" "$basedir"
-        chmod -R 755 "$basedir"
-        for f in $destfile/*; do
-          patchelf --set-interpreter /lib/ld-linux-x86-64.so.2 $f || true
-          patchelf --set-rpath /usr/lib $f || true
-        done
-        return
-      fi
-
       cp -Pv "$srcfile" "$destfile"
 
       chmod 755 "$destfile"
@@ -99,7 +79,7 @@ runCommand name
 
     pushd $out
     find tree -type d -exec chmod 0755 {} \;
-    mkfs.erofs -zlz4hc,12 -C1048576 -Efragments,dedupe,ztailpacking --all-root $name.raw tree/
+    mkfs.erofs --all-root $name.raw tree/
     veritysetup format --root-hash-file $name.roothash $name.raw $name.verity
     # TODO: pcks7 signature
     # openssl smime -sign -nocerts -noattr -binary -in ${name}.roothash \
diff --git a/overlays/default.nix b/overlays/default.nix
deleted file mode 100644
index 2c2cdce..0000000
--- a/overlays/default.nix
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  version
-}:
-
-final: prev: {
-  patos = prev.lib.makeScope prev.newScope (self: {
-    kernel = final.callPackage ../pkgs/kernel { };
-    glibc = final.callPackage ../pkgs/glibc { };
-    busybox = final.callPackage ../pkgs/busybox { };
-    openssl = final.callPackage ../pkgs/openssl { };
-    kexec = final.callPackage ../pkgs/kexec-tools { };
-    lvm2 = final.callPackage ../pkgs/lvm2 { };
-    tpm2-tools = final.callPackage ../pkgs/tpm2-tools { };
-    tpm2-tss = final.callPackage ../pkgs/tpm2-tss { };
-    systemd = final.callPackage ../pkgs/systemd { };
-    dbus-broker = final.callPackage ../pkgs/dbus-broker { };
-
-    rootfs = final.callPackage ../pkgs/rootfs/mkrootfs.nix { inherit version; };
-    initrd = final.callPackage ../pkgs/rootfs/mkinitrd.nix { inherit version; };
-  });
-}
diff --git a/pkgs/image/default.nix b/pkgs/image/default.nix
index 863c795..05d9c72 100644
--- a/pkgs/image/default.nix
+++ b/pkgs/image/default.nix
@@ -1,22 +1,23 @@
 {
   lib,
   pkgs,
+  patosPkgs,
   version,
   runCommand,
   updateUrl,
-  microcode ? "",
+  cpuArch ? "",
   secureBoot ? "false"
 }:
 let
   pname = "patos-image";
 in
 runCommand pname {
-  inherit version microcode updateUrl secureBoot;
+  inherit version cpuArch updateUrl secureBoot;
 
-  mcode = lib.optionalString (microcode == "amd") "--microcode ${pkgs.microcode-amd}/amd-ucode.img"
-      + lib.optionalString (microcode == "intel") "--microcode ${pkgs.microcode-intel}/intel-ucode.img";
+  microcode = lib.optionalString (cpuArch == "amd") "--microcode ${pkgs.microcode-amd}/amd-ucode.img"
+      + lib.optionalString (cpuArch == "intel") "--microcode ${pkgs.microcode-intel}/intel-ucode.img";
 
-  nativeBuildInputs = with pkgs; [
+  buildInputs = with pkgs; [
     erofs-utils
     dosfstools
     mtools
@@ -29,20 +30,20 @@ runCommand pname {
     SYSTEMD_REPART_MKFS_OPTIONS_EROFS = "--all-root -zlz4hc,12 -C1048576 -Efragments,dedupe,ztailpacking";
   };
 
-  kernelCmdLine = "systemd.journald.forward_to_console=1 console=ttyS0 patos.secureboot=${secureBoot}";
+  kernelCmdLine = "console=ttyS0 patos.secureboot=${secureBoot}";
 }
 ''
 mkdir -p $out/init.repart.d $out/final.repart.d
 pushd $out
 
 mkdir rootfs
-cp -prP ${pkgs.patos.rootfs}/* rootfs/
+cp -prP ${patosPkgs.rootfs}/* rootfs/
 find rootfs/ -type d -exec chmod 755 {} \;
 
 # package kernel modules as sysext (will reduce the image size a little bit (~3MB))
 mkdir rootfs/etc/extensions
 rm -rf rootfs/usr/lib/modules
-cp ${pkgs.patos.kernel}/patos-kernel-modules* rootfs/etc/extensions/
+cp ${patosPkgs.kernel}/patos-kernel-modules* rootfs/etc/extensions/
 
 # set default target to multi-user
 ln -sf multi-user.target rootfs/usr/lib/systemd/system/default.target
@@ -140,7 +141,6 @@ cat <<EOF > init.repart.d/10-root.conf
 Type=root
 Format=erofs
 Minimize=best
-AddValidateFS=false
 CopyFiles=/rootfs:/
 Verity=data
 VerityMatchKey=root
@@ -152,24 +152,21 @@ cat <<EOF > init.repart.d/20-root-verity.conf
 Type=root-verity
 Verity=hash
 VerityMatchKey=root
-AddValidateFS=false
 Minimize=best
 SplitName=verity
 EOF
 
 #TODO: Add verity signature partition
 
-${pkgs.patos.systemd}/usr/bin/systemd-repart \
+${patosPkgs.systemd}/usr/bin/systemd-repart \
   --no-pager \
   --empty=create \
   --size=auto \
-  --definitions=$out/init.repart.d \
+  --definitions=./init.repart.d \
   --split=true \
   --json=pretty \
   --root=$out \
-  patos_$version.raw > init-repart-output.json
-
-rm -f patos_$version.raw
+  patos_$version.raw > init-repart-output.json && rm -f patos_$version.raw
 
 roothash=$(jq -r '.[0].roothash' init-repart-output.json)
 rootPart=$(jq -r '.[0].split_path' init-repart-output.json)
@@ -181,16 +178,16 @@ verityUuid=$(jq -r '.[1].uuid' init-repart-output.json)
 ln -sf patos_$version.verity.raw patos_${version}_$verityUuid.verity
 ln -sf patos_$version.root.raw patos_${version}_$rootUuid.root
 
-${pkgs.patos.systemd}/usr/bin/ukify build \
-  --linux ${pkgs.patos.kernel}/bzImage \
-  --initrd ${pkgs.patos.initrd}/initrd.xz \
-  $mcode \
+${patosPkgs.systemd}/usr/bin/ukify build \
+  --linux ${patosPkgs.kernel}/bzImage \
+  --initrd ${patosPkgs.initrd}/initrd.xz \
+  $microcode \
   --os-release @rootfs/etc/os-release \
   --cmdline "$kernelCmdLine roothash=$roothash" \
   -o patos_${version}.efi
 
 # install ESP
-SYSTEMD_RELAX_ESP_CHECKS=1 ${pkgs.patos.systemd}/usr/bin/bootctl install --root ./rootfs --esp-path /boot
+SYSTEMD_RELAX_ESP_CHECKS=1 ${patosPkgs.systemd}/usr/bin/bootctl install --root ./rootfs --esp-path /boot
 
 # setup factory reset
 mkdir -p rootfs/boot/EFI/tools
@@ -220,14 +217,14 @@ Type=esp
 Format=vfat
 SizeMinBytes=128M
 SizeMaxBytes=128M
-CopyFiles=$out/rootfs/boot:/
+CopyFiles=/rootfs/boot:/
 EOF
 
 cat <<EOF > final.repart.d/20-root.conf
 [Partition]
 Type=root
 Label=root-${version}
-CopyBlocks=$out/$rootPart
+CopyBlocks=/$rootPart
 UUID=$rootUuid
 SizeMinBytes=64M
 SizeMaxBytes=64M
@@ -238,17 +235,18 @@ cat <<EOF > final.repart.d/22-root-verity.conf
 [Partition]
 Type=root-verity
 Label=verity-${version}
-CopyBlocks=$out/$verityPart
+CopyBlocks=/$verityPart
 UUID=$verityUuid
 ReadOnly=1
 EOF
 
 # finalize image ready for boot
-${pkgs.patos.systemd}/usr/bin/systemd-repart \
+${patosPkgs.systemd}/usr/bin/systemd-repart \
   --no-pager \
   --empty=create \
   --size=auto \
   --definitions=./final.repart.d \
+  --root=$out \
   patos_${version}.img > final-repart-output.json
 
 rm -rf rootfs init.repart.d final.repart.d *.json
diff --git a/pkgs/kernel/default.nix b/pkgs/kernel/default.nix
index 2a86881..51a05bf 100644
--- a/pkgs/kernel/default.nix
+++ b/pkgs/kernel/default.nix
@@ -1,7 +1,7 @@
 { pkgs }:
 let
-  version = "6.15.2";
-  hash = "sha256-NFjNamxQjhYdvFQG5yuZ1dvfkp+vcEpn25ukbQdRSFg=";
+  version = "6.13.8";
+  hash = "sha256-JZr6Wdc9Z2vsKuib6s2UngjVTT9wp/iwp0IxUJV1Grs=";
 in
 (pkgs.callPackage ./manual-config.nix { }) {
   version = "${version}-patos1";
diff --git a/pkgs/kexec-tools/default.nix b/pkgs/kexec-tools/default.nix
index b83a6a6..4ba15ba 100644
--- a/pkgs/kexec-tools/default.nix
+++ b/pkgs/kexec-tools/default.nix
@@ -4,7 +4,6 @@
   buildPackages,
   fetchFromGitHub,
   autoconf,
-  autoreconfHook,
   zlib,
 }:
 
@@ -15,8 +14,8 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "horms";
     repo = "kexec-tools";
-    rev = "v2.0.31";
-    hash = "sha256-Tgmc8mFlmzzRj7tEaBes7Udw4fRl6cSfe76iPNa3Ffs=";
+    rev = "a7fcd424c4c80dea5a2fd5ffa274ffeb8129c790";
+    hash = "sha256-QKE+KCkueA21zNunTMidP9OuZaw0IG5tFDF4UJITTTQ=";
   };
 
   dontPatchShebangs = true;
@@ -28,27 +27,20 @@ stdenv.mkDerivation {
     "pie"
   ];
 
-  preAutoreconf = "./bootstrap";
-
-  configurePlatforms = [
-    "build"
-    "host"
-  ];
-
-  configureFlags = [ "BUILD_CC=${buildPackages.stdenv.cc.targetPrefix}cc" "--prefix=/"];
-  depsBuildBuild = [ buildPackages.stdenv.cc ];
-
-  installPhase = ''
-      make DESTDIR=$out install
+  buildCommand = ''
+    unpackPhase
+    mkdir -p $out
+    cd source
+    ./bootstrap
+    ./configure --prefix=/
+    make DESTDIR=$out install
   '';
 
-  nativeBuildInputs = [
-    autoconf
-    autoreconfHook
-  ];
+  depsBuildBuild = [ buildPackages.stdenv.cc ];
 
   buildInputs = [
     zlib
+    autoconf
   ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/linux-firmware/default.nix b/pkgs/linux-firmware/default.nix
new file mode 100644
index 0000000..161b2e4
--- /dev/null
+++ b/pkgs/linux-firmware/default.nix
@@ -0,0 +1,38 @@
+{
+  stdenv,
+  pkgs,
+}:
+
+stdenv.mkDerivation {
+  pname = pkgs.linux-firmware.name;
+  version = pkgs.linux-firmware.version;
+  src = pkgs.linux-firmware.src;
+
+  buildInputs = with pkgs; [
+    erofs-utils
+    cryptsetup
+  ];
+
+  nativeBuildInputs = with pkgs; [
+    python3
+    rdfind
+    which
+    zstd
+  ];
+
+  noBrokenSymlinks = true;
+
+  installTargets = [
+    "install-zst"
+    "dedup"
+  ];
+
+  # inspo: https://gitlab.archlinux.org/archlinux/packaging/packages/linux-firmware/-/blob/main/PKGBUILD?ref_type=heads#L93
+  makeFlags = [
+    "DESTDIR=$(out)"
+    "ZSTD_CLEVEL=19"
+    "FIRMWAREDIR=/usr/lib/firmware"
+  ];
+
+  postInstall = ./post-install.sh;
+}
diff --git a/pkgs/linux-firmware/post-install.sh b/pkgs/linux-firmware/post-install.sh
new file mode 100755
index 0000000..2dbe3ca
--- /dev/null
+++ b/pkgs/linux-firmware/post-install.sh
@@ -0,0 +1,59 @@
+set -ex -uo pipefail
+
+_pick() {
+  local p="$1" f d; shift
+  for f; do
+    d="$out/$p/${f#$out/}"
+    mkdir -p "$(dirname "$d")"
+    mv $out/"$f" "$d"
+    rm -rf $out/"$f"
+  done
+}
+
+_package() {
+  local p="$1"
+  mkdir -p $out/$p/usr/lib/extension-release.d
+  cat << EOF > $out/$p/usr/lib/extension-release.d/extension-release.$p
+ID=patos
+IMAGE_ID=$p
+IMAGE_VERSION=$version
+VERSION_ID=patos
+EOF
+
+  mkfs.erofs --all-root -Efragments,dedupe,ztailpacking $out/$p.raw $out/$p
+  veritysetup format --root-hash-file $out/$p.roothash $out/$p.raw $out/$p.verity
+}
+
+# remove arm64 firmware https://bugs.archlinux.org/task/76583
+rm $out/usr/lib/firmware/mrvl/prestera/mvsw_prestera_fw_arm64-v4.1.img.zst
+
+_pick amd-ucode usr/lib/firmware/amd-ucode
+_package amd-ucode
+
+_pick linux-firmware-nfp usr/lib/firmware/netronome
+_package linux-firmware-nfp
+
+_pick linux-firmware-mellanox usr/lib/firmware/mellanox
+_package linux-firmware-mellanox
+
+_pick linux-firmware-marvell usr/lib/firmware/{libertas,mwl8k,mwlwifi,mrvl}
+_package linux-firmware-marvell
+
+_pick linux-firmware-qcom usr/lib/firmware/qcom
+_package linux-firmware-qcom
+
+_pick linux-firmware-liquidio usr/lib/firmware/liquidio
+_package linux-firmware-liquidio
+
+# _pick linux-firmware-qlogic usr/lib/firmware/{qlogic,qed,ql2???_*,c{b,t,t2}fw-*}
+# _package linux-firmware-qlogic
+
+# _pick linux-firmware-bnx2x usr/lib/firmware/bnx2x*
+# _package linux-firmware-bnx2x
+
+# and the rest is base firmware
+_pick linux-firmware usr/lib/firmware
+_package linux-firmware
+
+# clean up
+# rm -rf $out/usr
diff --git a/pkgs/rootfs/mkinitrd.nix b/pkgs/rootfs/mkinitrd.nix
index 0691e7b..c46ed9d 100644
--- a/pkgs/rootfs/mkinitrd.nix
+++ b/pkgs/rootfs/mkinitrd.nix
@@ -1,5 +1,6 @@
 {
   pkgs,
+  patosPkgs,
   runCommand,
   ...
 }:
@@ -9,7 +10,7 @@ in
 runCommand "patos-initrd" {
   inherit secureBootEnroll;
 
-  nativeBuildInputs = with pkgs; [
+  buildInputs = with pkgs; [
     cpio
     xz
   ];
@@ -20,7 +21,7 @@ mkdir -p $out/root
 pushd $out/root
 
 ### copy rootfs
-cp -prP ${pkgs.patos.rootfs}/* .
+cp -prP ${patosPkgs.rootfs}/* .
 find . -type d -exec chmod 755 {} \;
 mkdir sysroot
 
diff --git a/pkgs/rootfs/mkrootfs.nix b/pkgs/rootfs/mkrootfs.nix
index ed34662..bda4c7d 100644
--- a/pkgs/rootfs/mkrootfs.nix
+++ b/pkgs/rootfs/mkrootfs.nix
@@ -1,5 +1,6 @@
 {
   pkgs,
+  patosPkgs,
   version,
   runCommand,
 }:
@@ -11,9 +12,7 @@ runCommand "patos-rootfs"
 {
   inherit version;
 
-  nativeBuildInputs = with pkgs; [
-    stdenv.cc
-    patchelf
+  buildInputs = with pkgs;[
     glibc
     binutils
   ];
@@ -31,11 +30,12 @@ ln -sf /tmp $out/var/tmp
 ln -sf ../proc/self/mounts $out/etc/mtab
 
 ### install systemd
-cp -Pr ${pkgs.patos.systemd}/* $out/
+cp -Pr ${patosPkgs.systemd}/* $out/
 find $out -type d -exec chmod 755 {} \;
 rm -rf $out/usr/include
 rm -rf $out/usr/sbin
 ln -sf /usr/bin $out/usr/sbin
+rm -f $out/usr/lib/systemd/system/sysinit.target.wants/systemd-firstboot.service
 # enable in ramdisk instead
 rm -f $out/usr/lib/systemd/system/sysinit.target.wants/systemd-repart.service
 rm -f $out/usr/lib/systemd/system/initrd-root-fs.target.wants/systemd-repart.service
@@ -136,33 +136,33 @@ ManagerEnvironment=PATH=/bin:/sbin:/usr/bin SYSTEMD_CRYPTTAB=/run/crypttab SYSTE
 EOF
 
 ### install PatOS glibc
-cp -P ${pkgs.patos.glibc}/lib/*.so* $out/usr/lib/
+cp -P ${patosPkgs.glibc}/lib/*.so* $out/usr/lib/
 
 ### install openssl
-cp -P ${pkgs.patos.openssl}/lib/*.so* $out/usr/lib/
-cp -Pr ${pkgs.patos.openssl}/etc/ssl $out/etc/
+cp -P ${patosPkgs.openssl}/lib/*.so* $out/usr/lib/
+cp -Pr ${patosPkgs.openssl}/etc/ssl $out/etc/
 
 ### install busybox
-cp ${pkgs.patos.busybox}/bin/busybox $out/usr/bin/
+cp ${patosPkgs.busybox}/bin/busybox $out/usr/bin/
 $out/usr/bin/busybox --list | xargs -I {} ln -sf busybox $out/usr/bin/{}
 
 ### install dbus broker
-cp -r ${pkgs.patos.dbus-broker}/* $out/
+cp -r ${patosPkgs.dbus-broker}/* $out/
 
 ### install kexec
-cp -Pr ${pkgs.patos.kexec}/sbin/kexec $out/usr/bin/
+cp -Pr ${patosPkgs.kexec}/sbin/kexec $out/usr/bin/
 
 ### install dmsetup udev rules
-cp -P ${pkgs.patos.lvm2}/usr/bin/dmsetup $out/usr/bin/
-cp -P ${pkgs.patos.lvm2}/lib/libdevmapper.so* $out/usr/lib/
-cp -P ${pkgs.patos.lvm2}/lib/udev/rules.d/* $out/usr/lib/udev/rules.d/
+cp -P ${patosPkgs.lvm2}/usr/bin/dmsetup $out/usr/bin/
+cp -P ${patosPkgs.lvm2}/lib/libdevmapper.so* $out/usr/lib/
+cp -P ${patosPkgs.lvm2}/lib/udev/rules.d/* $out/usr/lib/udev/rules.d/
 
 ### install btrfs progs
 cp -Pr ${pkgs.btrfs-progs}/bin/* $out/usr/bin/
 cp -Pr ${pkgs.btrfs-progs}/lib/* $out/usr/lib/
 
 ### install tpm2 libs
-cp -P ${pkgs.patos.tpm2-tss}/lib/*.so* $out/usr/lib/
+cp -P ${patosPkgs.tpm2-tss}/lib/*.so* $out/usr/lib/
 
 ### install lib kmod
 cp -P ${pkgs.kmod.lib}/lib/*.so* $out/usr/lib/
@@ -193,22 +193,20 @@ ln -sf ../cert.pem $out/etc/ssl/certs/ca-bundle.crt
 rm -rf $out/usr/lib/pkgconfig
 
 # setup default files
-${pkgs.patos.systemd}/usr/bin/systemd-hwdb --root=$out --usr update
-${pkgs.patos.systemd}/usr/bin/systemd-tmpfiles --root=$out $out/usr/lib/tmpfiles.d/etc.conf --create
+${patosPkgs.systemd}/usr/bin/systemd-hwdb --root=$out --usr update
+${patosPkgs.systemd}/usr/bin/systemd-tmpfiles --root=$out $out/usr/lib/tmpfiles.d/etc.conf --create
 cp $out/usr/share/factory/etc/nsswitch.conf $out/etc/
 cp $out/usr/share/factory/etc/locale.conf $out/etc/
 cp $out/usr/share/factory/etc/vconsole.conf $out/etc/
 # install sys users
 mkdir creds
 echo -n ${defaultPassword} > creds/passwd.plaintext-password.root
-CREDENTIALS_DIRECTORY=$PWD/creds SYSTEMD_CRYPT_PREFIX='$6$' ${pkgs.patos.systemd}/usr/bin/systemd-sysusers --root=$out rootfs/usr/lib/sysusers.d/*.conf
+CREDENTIALS_DIRECTORY=$PWD/creds SYSTEMD_CRYPT_PREFIX='$6$' ${patosPkgs.systemd}/usr/bin/systemd-sysusers --root=$out rootfs/usr/lib/sysusers.d/*.conf
 chmod 600 $out/etc/shadow
 rm -rf creds
 
 # Ephemeral machine-id until registration
-# ln -sf /run/machine-id $out/etc/machine-id
-# FIXME: above line does not work in systemd > 257
-${pkgs.patos.systemd}/usr/bin/systemd-machine-id-setup --root=$out
+ln -sf /run/machine-id $out/etc/machine-id
 
 ### Find and install all shared libs
 find $out -type f -executable -exec ldd {} \; | awk '{print $3}' | \
@@ -218,17 +216,15 @@ find $out -type f -executable -exec ldd {} \; | awk '{print $3}' | \
 find $out -type f -executable -exec chmod 755 {} \;
 
 # patch ELFs
-interpreter=$(patchelf --print-interpreter $out/usr/bin/busybox)
-ldLinux=$(basename $interpreter)
 find $out -type f -executable -exec patchelf --set-rpath /lib:/usr/lib:/usr/lib/systemd:/usr/lib/cryptsetup {} \;
-find $out -type f -executable -exec patchelf --set-interpreter /lib/$ldLinux {} \;
-patchelf --remove-rpath $out/usr/lib/$ldLinux
+find $out -type f -executable -exec patchelf --set-interpreter /lib/ld-linux-x86-64.so.2 {} \;
+patchelf --remove-rpath $out/usr/lib/ld-linux-x86-64.so.2
 
 # strip binaries
-find $out -type f -executable -exec $STRIP {} \;
+find $out -type f -executable -exec strip {} \;
 find $out -type d -exec chmod 755 {} \;
 
 # install kernel modules
-cp -r ${pkgs.patos.kernel}/lib/modules $out/usr/lib/
+cp -r ${patosPkgs.kernel}/lib/modules $out/usr/lib/
 find $out/usr/lib/modules -type d -exec chmod 755 {} \;
 ''
diff --git a/pkgs/systemd/default.nix b/pkgs/systemd/default.nix
index dfe506c..a1cb314 100644
--- a/pkgs/systemd/default.nix
+++ b/pkgs/systemd/default.nix
@@ -7,7 +7,7 @@
   ...
 }:
 let
-  version = "devel";
+  version = "257.4";
 
   # Use the command below to update `releaseTimestamp` on every (major) version
   # change. More details in the commentary at mesonFlags.
@@ -26,8 +26,8 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "systemd";
     repo = "systemd";
-    rev = "959d7f1759d67994e3bed7b9d2f23e063475a872"; # main
-    hash = "sha256-IxGg0t/0GEllU4EPHqY2bwMDYwrQ5KWyE2QhwhTxqGs=";
+    rev = "v${version}";
+    hash = "sha256-6rxJUYRq785U6aik5VhQRqG+Ss67lBB6T3eQF+tkyhk=";
   };
 
   patches = [ ./skip-verify-esp.patch ];
@@ -137,10 +137,6 @@ stdenv.mkDerivation (finalAttrs: {
     ''
       substituteInPlace meson.build \
         --replace "find_program('clang'" "find_program('${stdenv.cc.targetPrefix}clang'"
-    '' +
-    ''
-      substituteInPlace src/test/meson.build \
-        --replace "test_env.set('SYSTEMD_LANGUAGE_FALLBACK_MAP', language_fallback_map)" ""
     ''
     + ''
       substituteInPlace src/ukify/ukify.py \
diff --git a/utils/qemu-aarch64-uefi-tpm.nix b/utils/qemu-aarch64-uefi-tpm.nix
deleted file mode 100644
index 87c9d69..0000000
--- a/utils/qemu-aarch64-uefi-tpm.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{
-  pkgs,
-  ...
-}:
-pkgs.writeShellApplication {
-  name = "qemu-aarch64-uefi-tpm";
-
-  runtimeInputs = with pkgs; [
-    qemu
-    swtpm
-  ];
-
-  text =
-    let
-      tpmOVMF = pkgs.OVMF.override {
-        tpmSupport = true;
-        secureBoot = true;
-      };
-    in
-    ''
-      set -ex
-      state="/tmp/patos-qemu-$USER"
-      rm -rf "$state"
-      mkdir -m 700 "$state"
-      qemu-img create -f qcow2 -F raw -b "$(readlink -e "$1")" "$state/disk.qcow2" 2G
-
-      OVMF_FD=$(nix-build '<nixpkgs>' --no-out-link -A OVMF.fd --system aarch64-linux)
-      cp "$OVMF_FD/AAVMF/vars-template-pflash.raw" "$state/vars-pflash.raw"
-      chmod u+w "$state/vars-pflash.raw"
-
-      # swtpm socket -d --tpmstate dir="$state" \
-      #   --ctrl type=unixio,path="$state/swtpm-sock" \
-      #   --tpm2 \
-      #   --log file="$state/swtpm.log",level=20
-
-      qemu-system-aarch64 \
-        -machine virt,gic-version=max \
-        -cpu max \
-        -smp 8 \
-        -m 4G \
-        -display none \
-        -serial stdio \
-        -drive "if=pflash,format=raw,unit=0,readonly=on,file=$OVMF_FD/AAVMF/QEMU_EFI-pflash.raw" \
-        -drive "if=pflash,format=raw,unit=1,file=$state/vars-pflash.raw" \
-        -device virtio-scsi-pci \
-        -device virtio-gpu-pci \
-        -device virtio-net-pci,netdev=wan \
-        -netdev user,id=wan \
-        -device virtio-rng-pci,rng=rng0 \
-        -object rng-random,filename=/dev/urandom,id=rng0 \
-        -device virtio-serial-pci \
-        -drive "format=qcow2,file=$state/disk.qcow2"
-    '';
-}