feat: add support for untagged frames

Should cover egress & ingress.

Signed-off-by: Raito Bezarius <masterancpp@gmail.com>

default.nix

@@ -25,13 +25,7 @@ let
 
   eval = evalModules {
     modules = [
-      ({ lib, pkgs, ... }: {
-        _module.args = {
-          utils = import "${nixpkgs}/nixos/lib/utils.nix" {
-            inherit lib pkgs;
-            config.systemd.globalEnvironment = {};
-          };
-        };
+      {
         nixpkgs = {
           source = nixpkgs;
           overlays = [ overlay ];
@@ -39,7 +33,7 @@ let
             "python-2.7.18.8"
           ];
         };
-      })
+      }
       device.module
       liminix-config
     ];
@@ -63,7 +57,7 @@ let
     ];
   }).config.system;
 in {
-  inherit evalModules config;
+  inherit evalModules;
 
   outputs = config.system.outputs // {
     default = config.system.outputs.${config.hardware.defaultOutput};

lib/eval-config.nix

@@ -12,9 +12,10 @@ in
     "${modulesPath}/hardware.nix"
     "${modulesPath}/base.nix"
     "${modulesPath}/busybox.nix"
+    "${modulesPath}/iproute2.nix"
     "${modulesPath}/hostname.nix"
     "${modulesPath}/kernel"
-    "${modulesPath}/systemd"
+    "${modulesPath}/s6"
     "${modulesPath}/users.nix"
     "${modulesPath}/outputs.nix"
     "${modulesPath}/nixpkgs.nix"

modules/all-modules.nix

@@ -4,9 +4,10 @@
 
 {
   imports = [
-   ./base.nix
+    ./base.nix
    ./bridge
    ./busybox.nix
+   ./iproute2.nix
    ./dhcp6c
    ./jitter-rng
    ./dnsmasq

modules/base.nix

@@ -2,7 +2,7 @@
 ## ============
 
 
-{ lib, pkgs, utils, config, ...}:
+{ lib, pkgs, config, ...}:
 let
   inherit (lib) mkEnableOption mkOption types isDerivation hasAttr concatStringsSep mapAttrsToList;
   inherit (pkgs.pseudofile) dir symlink;
@@ -43,12 +43,9 @@ in {
         '';
       };
     };
-
-    # deprecated
     services = mkOption {
       type = types.attrsOf type_service;
     };
-
     system.callService = mkOption {
       type = types.functionTo (types.functionTo types.anything);
     };
@@ -132,12 +129,10 @@ in {
     # By default, we enable cross-compilation support.
     nixpkgs.buildPlatform = lib.mkDefault builtins.currentSystem;
 
+    defaultProfile.packages = with pkgs;
+      [ s6 s6-init-bin execline s6-linux-init s6-rc iproute2 ];
     # Set the useful PS1 prompt by default.
     defaultProfile.environmentVariables.PS1 = lib.mkDefault config.defaultProfile.prompt;
-    defaultProfile.packages = with pkgs; [
-      # execline
-      systemd
-    ];
 
     boot.commandLine = [
       "panic=10 oops=panic init=/bin/init loglevel=8"

modules/bridge/default.nix

@@ -9,8 +9,7 @@
 
 { lib, pkgs, config, ...}:
 let
-  inherit (lib) mkOption types;
-  inherit (pkgs.liminix.services) oneshot;
+  inherit (lib) mkOption types mkEnableOption;
   inherit (pkgs) liminix;
 in
 {
@@ -35,6 +34,20 @@ in
         default = null;
         description = "reuse mac address from an existing interface service";
       };
+
+      untagged = {
+        enable = mkEnableOption "untagged frames on port VID";
+        pvid = mkOption {
+          type = types.nullOr types.int;
+          default = null;
+          description = "Port VLAN ID for egress untagged frames";
+        };
+        default-pvid = mkOption {
+          type = types.int;
+          default = 0;
+          description = "Default PVID for ingress untagged frames, defaults to 0, which disable untagged frames for ingress";
+        };
+      };
     };
     members = config.system.callService ./members.nix {
       primary = mkOption {

modules/bridge/primary.nix

@@ -3,17 +3,22 @@
 , ifwait
 , lib
 }:
-{ ifname, macAddressFromInterface ? null } :
+{ ifname, macAddressFromInterface ? null, untagged } :
 let
-  inherit (liminix.services) bundle oneshot;
-  inherit (lib) mkOption types optional;
+  inherit (liminix.services) oneshot;
+  inherit (lib) optional optionalString;
+  # This enables vlan_filtering if we do make use of it.
+  extra = if untagged.enable then " vlan_filtering 1 vlan_default_pvid ${toString untagged.default-pvid}" else "";
 in oneshot rec {
   name = "${ifname}.link";
   up = ''
     ${if macAddressFromInterface == null then
-      "ip link add name ${ifname} type bridge"
+      "ip link add name ${ifname} type bridge${extra}"
       else
-      "ip link add name ${ifname} address $(output ${macAddressFromInterface} ether) type bridge"}
+      "ip link add name ${ifname} address $(output ${macAddressFromInterface} ether) type bridge${extra}"}
+
+      ${optionalString untagged.enable 
+        "bridge vlan add vid ${toString untagged.pvid} dev ${ifname} pvid untagged self"}
 
       (in_outputs ${name}
         echo ${ifname} > ifname

modules/busybox.nix

@@ -37,7 +37,7 @@ let
     "comm" "cp" "cpio" "cut" "date" "dhcprelay" "dd" "df" "dirname" "dmesg"
     "du" "echo" "egrep" "env" "expand" "expr" "false" "fdisk" "fgrep" "find"
     "free" "fuser" "grep" "gunzip" "gzip" "head" "hexdump" "hostname" "hwclock"
-    "ifconfig" "ip" "ipaddr" "iplink" "ipneigh" "iproute" "iprule" "kill"
+    "ifconfig" "ipneigh" "kill"
     "killall" "killall5" "less" "ln" "ls" "lsattr" "lsof" "md5sum" "mkdir"
     "mknod" "mktemp" "mount" "mv" "nc" "netstat" "nohup" "od" "pgrep" "pidof"
     "ping" "ping6" "pkill" "pmap" "printenv" "printf" "ps" "pwd" "readlink"
@@ -51,7 +51,7 @@ let
 in {
   options = {
     programs.busybox = {
-      applets = mkOption {
+      applets =  mkOption {
         type = types.listOf types.str;
         description = "Applets required";
         default = [];
@@ -62,19 +62,13 @@ in {
         # other strings are also used
         description = "Other busybox config flags that do not map directly to applet names (often prefixed FEATURE_)";
         type = types.attrsOf types.nonEmptyStr;
-        default = { };
-        example = { FEATURE_DD_IBS_OBS = "y"; };
-      };
-      package = mkOption {
-        type = types.package;
-        readOnly = true;
-        internal = true;
+        default =  { };
+        example =  { FEATURE_DD_IBS_OBS = "y"; };
       };
     };
   };
   config = {
     programs.busybox = {
-      package = busybox;
       applets = minimalApplets;
       options = {
         ASH_ECHO = "y";

modules/iproute2.nix

@@ -0,0 +1,28 @@
+{ config, pkgs, lib, ... }:
+let
+  inherit (lib) mkEnableOption mkPackageOption mkIf genAttrs;
+  inherit (pkgs.pseudofile) dir symlink;
+  cfg = config.programs.iproute2;
+  minimalPrograms = [
+    "ip"
+    "devlink"
+    "ss"
+    "bridge"
+    "genl"
+    "ifstat"
+    "nstat"
+  ];
+  links = genAttrs minimalPrograms (p: symlink "${cfg.package}/bin/${p}");
+in
+{
+  options.programs.iproute2 = {
+    enable = mkEnableOption "the iproute2 programs instead of busybox variants";
+    package = mkPackageOption pkgs "iproute2" { };
+  };
+
+  config = mkIf cfg.enable {
+    filesystem = dir {
+      bin = dir links;
+    };
+  };
+}

modules/outputs/initramfs.nix

@@ -54,7 +54,7 @@ in
             mount -t sysfs none /sys
             ${busybox}/bin/sh
           '';
-          refs = pkgs.writeReferencesToFile busybox;
+          refs = pkgs.writeClosure [ busybox ];
         in runCommand "initramfs.cpio" {} ''
           cat << SPECIALS | ${gen_init_cpio}/bin/gen_init_cpio /dev/stdin > out
           dir /proc 0755 0 0

modules/s6/default.nix

@@ -186,11 +186,8 @@ in {
           };
         };
       };
-      # bin = dir {
-      #   init = symlink "${s6-init-bin}/bin/init";
-      # };
       bin = dir {
-        init = symlink "${pkgs.systemd}/bin/init";
+        init = symlink "${s6-init-bin}/bin/init";
       };
     };
   };

modules/s6/scripts/rc.shutdown

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+
+### Things to do before hardware halt/reboot/poweroff.
+### Ideally, it should be a single call to the service manager,
+### telling it to bring all the services down.
+
+### If your s6-linux-init-maker invocation was made with the -1
+### option, messages from rc.shutdown will appear on /dev/console
+### as well as be logged by the catch-all logger.
+### If your s6-linux-init-maker invocation did NOT include the -1
+### option, messages from rc.shutdown will only be logged by the
+### catch-all logger and will NOT appear on /dev/console. In order
+### to print them to /dev/console instead, you may want to
+### uncomment the following line:
+exec >/dev/console 2>&1
+
+### If your services are managed by s6-rc:
+exec s6-rc -v2 -bDa change

modules/s6/scripts/rc.shutdown.final

@@ -0,0 +1,22 @@
+#!/bin/sh -e
+
+##  s6-linux-init-shutdownd never tells s6-svscan to exit, so if
+##  you're running s6-linux-init, it's normal that your
+##  .s6-svscan/finish script is not executed.
+
+##  The place where you want to hack things is /etc/rc.shutdown.final,
+##  which is run by the stage 4 script right before the hard reboot.
+##  So you can do dirty stuff [...] which should clean up the
+##  s6-supervise and the foreground, and give control to
+##  .s6-svscan/finish.
+
+## -- Laurent Bercot on skaware mailing list,
+##    https://skarnet.org/lists/skaware/1913.html
+
+exec >/dev/console 2>&1
+
+# down, exit supervisor, wait, stay down
+s6-svc -dxwD /run/service/s6-linux-init-shutdownd
+# HUP, exit supervisor, wait, down
+s6-svc -hxwd /run/service/s6-svscan-log
+s6-svscanctl -b /run/service # abort

modules/s6/scripts/runlevel

@@ -0,0 +1,12 @@
+#!/bin/sh -e
+
+### This script is called once at boot time by rc.init, and is
+### also called by the runleveld service every time the user
+### requests a machine state change via telinit.
+### Ideally, it should just be a call to the service manager.
+
+test "$#" -gt 0 || { echo 'runlevel: fatal: too few arguments' 1>&2 ; exit 100 ; }
+
+
+### If your services are managed by s6-rc:
+exec s6-rc -v2 -up change "$1"

modules/systemd/default.nix

@@ -1,150 +0,0 @@
-{
-  pkgs,
-  lib,
-  config,
-  utils,
-  ...
-}:
-let
-  inherit (lib)
-    mapAttrs'
-    nameValuePair
-    mkMerge
-    mapAttrsToList
-    mkOption
-    ;
-  inherit (pkgs.pseudofile) dir symlink;
-  inherit (utils.systemdUtils.lib)
-    targetToUnit
-    serviceToUnit
-    ;
-
-  systemd-types = import ./types.nix { inherit pkgs utils lib; busybox = config.programs.busybox.package; };
-
-  units-texts = mapAttrs' (
-    _: unit:
-    nameValuePair unit.name {
-      file = unit.text;
-      mode = "0644";
-    }
-  ) config.systemd.units;
-  units-aliases = mkMerge (
-    mapAttrsToList (
-      _: unit:
-      mkMerge (
-        map (aka: {
-          ${aka} = symlink "${unit.name}";
-        }) (unit.aliases or [ ])
-      )
-    ) config.systemd.units
-  );
-  units-extraWants = mkMerge (
-    mapAttrsToList (
-      _: unit:
-      mkMerge (
-        map (unit2: {
-          "${unit2}.wants" = dir {
-            ${unit.name} = symlink "../${unit.name}";
-          };
-        }) (unit.wantedBy or [ ])
-      )
-    ) config.systemd.units
-  );
-  units-extraUpholds = mkMerge (
-    mapAttrsToList (
-      _: unit:
-      mkMerge (
-        map (unit2: {
-          "${unit2}.upholds" = dir {
-            ${unit.name} = symlink "../${unit.name}";
-          };
-        }) (unit.upheldBy or [ ])
-      )
-    ) config.systemd.units
-  );
-  units-extraRequires = mkMerge (
-    mapAttrsToList (
-      _: unit:
-      mkMerge (
-        map (unit2: {
-          "${unit2}.requires" = dir {
-            ${unit.name} = symlink "../${unit.name}";
-          };
-        }) (unit.requiredBy or [ ])
-      )
-    ) config.systemd.units
-  );
-in
-{
-  options = {
-    systemd = {
-      units = mkOption {
-        type = systemd-types.units;
-      };
-      services = mkOption {
-        type = systemd-types.services;
-      };
-      targets = mkOption {
-        type = systemd-types.targets;
-      };
-    };
-  };
-  config = {
-    systemd = {
-      units = mkMerge [
-        (mapAttrs' (_: service: nameValuePair service.name (serviceToUnit service)) config.systemd.services)
-        (mapAttrs' (_: target: nameValuePair target.name (targetToUnit target)) config.systemd.targets)
-      ];
-      services = {
-        getty = {
-          wantedBy = [ "default.target" ];
-          unitConfig = {
-            Description = "Serial Shell";
-            Before = [ "default.target" ];
-          };
-          script = ''
-            # . /etc/profile
-            exec /bin/ash < /dev/ttyS0 > /dev/ttyS0 2> /dev/ttyS0
-          '';
-        };
-      };
-      targets = {
-        default = { };
-        sysinit = { };
-      };
-    };
-
-    kernel.config = {
-      CGROUPS = "y";
-      DEVTMPFS = "y";
-      INOTIFY_USER = "y";
-      SIGNALFD = "y";
-      TIMERFD = "y";
-      EPOLL = "y";
-      UNIX = "y";
-      SYSFS = "y";
-      PROC_FS = "y";
-      FHANDLE = "y";
-    };
-    boot.commandLine = [
-      "systemd.log_level=7"
-      #"systemd.crash_shell=true"
-    ];
-    filesystem = dir {
-      etc = dir {
-        systemd = dir {
-          system = dir (mkMerge [
-            units-texts
-            units-aliases
-            units-extraWants
-            units-extraUpholds
-            units-extraRequires
-          ]);
-        };
-      };
-      bin = dir {
-        init = symlink "${pkgs.systemd}/bin/init";
-      };
-    };
-  };
-}

modules/systemd/types.nix

@@ -1,30 +0,0 @@
-{
-  pkgs,
-  lib,
-  utils,
-  busybox
-}:
-let
-  inherit (utils.systemdUtils.lib) serviceConfig unitConfig;
-  inherit (utils.systemdUtils.unitOptions) stage2ServiceOptions;
-  stage2ServiceConfig = {
-    imports = [ serviceConfig ];
-    # Default path for systemd services. Should be quite minimal.
-    config.path = lib.mkAfter [
-      busybox
-      # pkgs.coreutils
-      # pkgs.gnugrep
-      # pkgs.gnused
-      pkgs.systemd
-    ];
-  };
-in
-{
-  inherit (utils.systemdUtils.types) units targets;
-  services = lib.types.attrsOf (lib.types.submodule [
-    { enableStrictShellChecks = false; }
-    unitConfig
-    stage2ServiceOptions
-    stage2ServiceConfig
-  ]);
-}

modules/vlan/default.nix

@@ -33,6 +33,11 @@ in
       description = "VLAN identifier (VID) in range 1-4094";
       type = types.str;
     };
+    untagged.egress = mkOption {
+      description = "Whether packets from this interface will go out *untagged*";
+      type = types.bool;
+      default = false;
+    };
   };
   config.kernel.config = {
     VLAN_8021Q = "y";

modules/vlan/service.nix

@@ -2,13 +2,15 @@
   liminix
 , lib
 }:
-{ ifname, primary, vid } :
+{ ifname, primary, vid, untagged } :
 let
+  inherit (lib) optionalString;
   inherit (liminix.services) oneshot;
 in oneshot rec {
   name = "${ifname}.link";
   up = ''
     ip link add link $(output ${primary} ifname) name ${ifname} type vlan id ${vid}
+    ${optionalString untagged.egress "bridge vlan add dev ${ifname} vid ${toString untagged.vid} pvid untagged master"}
     ${liminix.networking.ifup name ifname}
     (in_outputs ${name}
      echo ${ifname} > ifname

overlay.nix

@@ -141,7 +141,9 @@ extraPkgs // {
            repo = "hostapd";
            rev = "hostap-liminix-integration";
            hash = "sha256-5Xi90keCHxvuKR5Q7STuZDzuM9h9ac6aWoXVQYvqkQI=";
-        };
+         };
+        # Do not take any patch.
+        patches = [];
         extraConfig = "";
         configurePhase = ''
           cat > hostapd/defconfig <<EOF
@@ -184,6 +186,7 @@ extraPkgs // {
            rev = "hostap-liminix-integration";
            hash = "sha256-5Xi90keCHxvuKR5Q7STuZDzuM9h9ac6aWoXVQYvqkQI=";
       };
+      patches = [];
       extraConfig = "";
       configurePhase = ''
         cat > hostapd/defconfig <<EOF
@@ -194,6 +197,30 @@ extraPkgs // {
     });
   in h.override { openssl = null; sqlite = null; };
 
+  libnl = prev.libnl.override {
+    graphviz = null;
+  };
+
+  iproute2 =
+  let i = prev.iproute2.overrideAttrs (old: {
+    postInstall = ''
+      ${(old.postInstall or "")}
+      non_necessary_binaries=("tc" "rdma" "dcb" "tipc" "vdpa")
+      for needless_binary in "''${non_necessary_binaries[@]}"; do
+        echo "Removing unnecessary binary $out/sbin/$needless_binary"
+        rm "$out/sbin/$needless_binary"
+      done
+      # No man
+      rm -rf "$out/share"
+      # Remove all the data about distributions for tc.
+      rm -rf "$out/lib"
+    '';
+  });
+  # Don't bring ebpf stuff to the table.
+  # We also remove tc so we can drop iptables as well.
+  # Let's try to kill `db` as well.
+  in i.override { elfutils = null; iptables = null; db = null; };
+
   wpa_supplicant = prev.wpa_supplicant.override {
     dbusSupport = false;
     withPcsclite = false;
@@ -259,12 +286,7 @@ extraPkgs // {
     patches = o.patches ++ [
       ./pkgs/qemu/arm-image-friendly-load-addr.patch
     ];
-  }); in q.override {
-    vde2 = null;
-    nixosTestRunner = true;
-    sdlSupport = false;
-    hostCpuTargets = [ "mips-softmmu" ];
-  };
+  }); in q.override { nixosTestRunner = true; sdlSupport = false; };
 
   rsyncSmall =
     let r = prev.rsync.overrideAttrs(o: {
@@ -289,192 +311,6 @@ extraPkgs // {
 
   strace = prev.strace.override { libunwind = null; };
 
-  getent =
-    prev.callPackage ({
-      lib,
-      stdenv,
-      fetchFromGitHub,
-    }:
-
-    stdenv.mkDerivation rec {
-      pname = "musl-utils";
-      version = "1.1.12-r7";
-
-      src = fetchFromGitHub {
-        owner = "boltlinux";
-        repo = "musl-utils";
-        rev = version;
-        hash = "sha256-q9CbOyK0Psw3YJnIT3yPRWuwr40nxLZt4RexuOHAUuw=";
-      };
-
-      nativeBuildInputs = [
-        prev.autoconf
-        prev.automake
-      ];
-
-      preConfigure = ''
-        autoreconf -i
-      '';
-
-      buildPhase = ''
-        make -C src getent
-      '';
-
-      installPhase = ''
-        mkdir -p $out/bin/
-        cp src/getent $out/bin/
-      '';
-
-      meta = {
-        description = "Alpine Linux' getconf, getent and iconv implementations";
-        homepage = "https://github.com/boltlinux/musl-utils";
-        license = lib.licenses.free; # FIXME: nix-init did not find a license
-        maintainers = with lib.maintainers; [ ];
-        mainProgram = "musl-utils";
-        platforms = lib.platforms.all;
-      };
-    }) { };
-
-  writeShellScriptBin = name: text:
-    final.writeTextFile {
-      inherit name;
-      executable = true;
-      destination = "/bin/${name}";
-      text = ''
-        #!/bin/ash
-        ${text}
-      '';
-      checkPhase = ''
-        ${final.stdenv.shellDryRun} "$target"
-      '';
-      meta.mainProgram = name;
-    };
-
-  systemd =
-    let base = prev.systemd.override {
-      kbd = "";
-      coreutils = "";
-      bash = null;
-      bashInteractive = "";
-
-      withAcl = false;
-      withAnalyze = false;
-      withApparmor = false;
-      withAudit = false;
-      withBootloader = false;
-      withCompression = false;
-      withCoredump = false;
-      withCryptsetup = false;
-      withRepart = false;
-      withDocumentation = false;
-      withEfi = false;
-      withFido2 = false;
-      withHomed = false;
-      withHostnamed = false;
-      withHwdb = false;
-      withImportd = false;
-      withIptables = false;
-      withKmod = false;
-      withLibBPF = false;
-      withLibidn2 = false;
-      withLocaled = false;
-      withLogind = false;
-      withMachined = false;
-      withNetworkd = false;
-      withNss = false;
-      withOomd = false;
-      withPam = false;
-      withPasswordQuality = false;
-      withPCRE2 = false;
-      withPolkit = false;
-      withPortabled = false;
-      withQrencode = false;
-      withRemote = false;
-      withResolved = false;
-      withShellCompletions = false;
-      withSysusers = false;
-      withSysupdate = false;
-      withTimedated = false;
-      withTimesyncd = false;
-      withTpm2Tss = false;
-      withUkify = false;
-      withUserDb = false;
-      withUtmp = false;
-      withVmspawn = false;
-      withKernelInstall = false;
-      withLibarchive = false;
-    };
-    in base.overrideAttrs (o: {
-      mesonFlags = o.mesonFlags ++ [
-      #  "--optimization=s"
-        "--default-library=static"
-        "--buildtype=minsize"
-        # (final.lib.mesonBool "static-libsystemd" true)
-        # (final.lib.mesonBool "standalone-binaries" true)
-
-      #  (final.lib.mesonBool "link-udev-shared" false)
-      #  (final.lib.mesonBool "link-executor-shared" false)
-      #  (final.lib.mesonBool "link-systemctl-shared" false)
-      #  (final.lib.mesonBool "link-networkd-shared" false)
-      #  (final.lib.mesonBool "link-timesyncd-shared" false)
-      #  (final.lib.mesonBool "link-journalctl-shared" false)
-      #  (final.lib.mesonBool "link-boot-shared" false)
-      #  (final.lib.mesonBool "link-portabled-shared" false)
-      ];
-      postInstall = o.postInstall + ''
-        rm -rf $out/share
-        rm $out/lib/libudev.so*
-        rm -rf $out/lib/systemd/catalog
-        rm -rf $out/lib/systemd/system-generators
-        rm $out/lib/systemd/systemd-backlight
-        rm $out/lib/systemd/systemd-battery-check
-        rm $out/lib/systemd/systemd-hibernate-resume
-        rm $out/lib/systemd/systemd-makefs
-        rm $out/lib/systemd/systemd-nsresourced
-        rm $out/lib/systemd/systemd-nsresourcework
-        rm $out/lib/systemd/systemd-shutdown
-        rm $out/lib/systemd/systemd-sleep
-        rm $out/lib/systemd/systemd-binfmt
-        rm $out/lib/systemd/systemd-growfs
-        rm $out/lib/systemd/systemd-mountfsd
-        rm $out/lib/systemd/systemd-mountwork
-        rm $out/lib/systemd/systemd-network-generator
-        rm $out/lib/systemd/systemd-pstore
-        rm $out/lib/systemd/systemd-remount-fs
-        rm $out/lib/systemd/systemd-reply-password
-        rm $out/lib/systemd/systemd-rfkill
-        rm $out/lib/systemd/systemd-socket-proxyd
-        rm $out/lib/systemd/systemd-ssh-proxy
-        rm $out/lib/systemd/systemd-storagetm
-        rm $out/lib/systemd/systemd-volatile-root
-        rm $out/lib/systemd/systemd-xdg-autostart-condition
-        rm -rf $out/example
-        rm $out/bin/bootctl
-        rm $out/bin/systemd-nspawn
-        rm $out/bin/systemd-ac-power
-        rm $out/bin/systemd-dissect
-        rm $out/bin/systemd-ask-password
-        rm $out/bin/systemd-cgls
-        rm $out/bin/systemd-cgtop
-        rm $out/bin/systemd-creds
-        rm $out/bin/systemd-delta
-        rm $out/bin/systemd-detect-virt
-        rm $out/bin/systemd-escape
-        rm $out/bin/systemd-id128
-        rm $out/bin/systemd-machine-id-setup
-        rm $out/bin/systemd-path
-        rm $out/bin/systemd-run
-        rm $out/bin/systemd-socket-activate
-        rm $out/bin/systemd-stdio-bridge
-        rm $out/bin/systemd-sysext
-        rm $out/bin/systemd-tty-ask-password-agent
-        rm $out/bin/systemd-vpick
-
-        # rm $out/lib/libsystemd.a
-        # rm $out/lib/systemd/libsystemd-shared-256.so
-      '';
-    });
-
   ubootQemuAarch64 = final.buildUBoot {
     defconfig = "qemu_arm64_defconfig";
     extraMeta.platforms = ["aarch64-linux"];

pkgs/initramfs-peek/default.nix

@@ -3,7 +3,7 @@
 , pkgsBuildBuild
 , runCommand
 , cpio
-, writeReferencesToFile
+, writeClosure
 , writeScript
 } :
 let
@@ -18,7 +18,7 @@ let
     mount -t sysfs none /sys
     ${busybox}/bin/sh
   '';
-  refs = writeReferencesToFile busybox;
+  refs = writeClosure [ busybox ];
 in runCommand "initramfs.cpio" { } ''
   cat << SPECIALS | ${gen_init_cpio}/bin/gen_init_cpio /dev/stdin > out
   dir /proc 0755 0 0

pkgs/levitate/default.nix

@@ -2,6 +2,7 @@
   writeScriptBin
 , writeScript
 , systemconfig
+, stdenv
 , execline
 , lib
 , config ? {}
@@ -56,11 +57,19 @@ let
       };
       eval = lib.evalModules {
         modules = [
-          { _module.args = { inherit pkgs; inherit (pkgs) lim; }; }
           ../../modules/base.nix
           ../../modules/users.nix
           ../../modules/busybox.nix
+          ../../modules/hostname.nix
+          ../../modules/misc/assertions.nix
+          ../../modules/nixpkgs.nix
           base
+          {
+            # Inherit from that target system host platform.
+            nixpkgs.hostPlatform = stdenv.hostPlatform;
+            # Force our own package set.
+            nixpkgs.pkgs = lib.mkForce pkgs;
+          }
           ({ ... } : paramConfig)
           ../../modules/s6
         ];