Remove proot from nix-portable

The pkgsStatic.proot is broken due to failed
dependencies. In upstream nix-portable they have
a custom derivation on top o proot gitlab. But
since we don't need it, we can remove it safely.

Reviewed-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>

m/hut/gitlab-runner.nix

@@ -51,6 +51,7 @@
           "/nix/store:/nix/store:ro"
           "/nix/var/nix/db:/nix/var/nix/db:ro"
           "/nix/var/nix/daemon-socket:/nix/var/nix/daemon-socket:ro"
+          "/var/run/postgresql/:/var/run/postgresql/"
         ];
         dockerExtraHosts = [
           # Required to pass the proxy via hut

m/hut/monitoring.nix

@@ -5,7 +5,7 @@
     ../module/slurm-exporter.nix
     ../module/meteocat-exporter.nix
     ../module/upc-qaire-exporter.nix
-    ./gpfs-probe.nix
+    ./ssh-robot-probes.nix
     ../module/nix-daemon-exporter.nix
   ];
 
@@ -111,6 +111,7 @@
             "127.0.0.1:${toString config.services.prometheus.exporters.smartctl.port}"
             "127.0.0.1:9341" # Slurm exporter
             "127.0.0.1:9966" # GPFS custom exporter
+            "127.0.0.1:9967" # SLURM custom exporter
             "127.0.0.1:9999" # Nix-daemon custom exporter
             "127.0.0.1:9929" # Meteocat custom exporter
             "127.0.0.1:9928" # UPC Qaire custom exporter

m/hut/postgresql.nix

@@ -8,12 +8,14 @@
       { name = "anavarro"; ensureClauses.superuser = true; }
       { name = "rarias";   ensureClauses.superuser = true; }
       { name = "grafana"; }
+      { name = "gitlab-runner"; }
     ];
     authentication = ''
-      #type  database     DBuser    auth-method
-      local  perftestsdb  rarias    trust
-      local  perftestsdb  anavarro  trust
-      local  perftestsdb  grafana   trust
+      #type  database     DBuser         auth-method
+      local  perftestsdb  rarias         trust
+      local  perftestsdb  anavarro       trust
+      local  perftestsdb  grafana        trust
+      local  perftestsdb  gitlab-runner  trust
     '';
   };
 }

m/hut/sblame-probe.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+cat <<EOF
+HTTP/1.1 200 OK
+Content-Type: text/plain; version=0.0.4; charset=utf-8; escaping=values
+
+EOF
+ssh bsc015557@glogin2.bsc.es "timeout 3 command sblame -E"

m/hut/ssh-robot-probes.nix

@@ -6,6 +6,12 @@ let
       chmod +x $out
     ''
   ;
+  sblame-probe-script = pkgs.runCommand "sblame-probe.sh" { }
+    ''
+      cp ${./sblame-probe.sh} $out;
+      chmod +x $out
+    ''
+  ;
 in
 {
   # Use a new user to handle the SSH keys
@@ -28,4 +34,17 @@ in
       Group = "ssh-robot";
     };
   };
+
+  systemd.services.sblame-probe = {
+    description = "Daemon to report SLURM statistics via SSH";
+    path = [ pkgs.openssh pkgs.netcat ];
+    after = [ "network.target" ];
+    wantedBy = [ "default.target" ];
+    serviceConfig = {
+      Type = "simple";
+      ExecStart = "${pkgs.socat}/bin/socat TCP4-LISTEN:9967,fork EXEC:${sblame-probe-script}";
+      User = "ssh-robot";
+      Group = "ssh-robot";
+    };
+  };
 }

overlay.nix

@@ -39,9 +39,8 @@ let
     nanos6Debug = final.nanos6.override { enableDebug = true; };
     nixtools = callPackage ./pkgs/nixtools/default.nix { };
     nixgen = callPackage ./pkgs/nixgen/default.nix { };
-    # Broken because of pkgsStatic.libcap
-    # See: https://github.com/NixOS/nixpkgs/pull/268791
-    #nix-wrap = callPackage ./pkgs/nix-wrap/default.nix { };
+    nix-portable = callPackage ./pkgs/nix-portable/default.nix { };
+    nix-wrap = callPackage ./pkgs/nix-wrap/default.nix { };
     nodes = callPackage ./pkgs/nodes/default.nix { };
     nosv = callPackage ./pkgs/nosv/default.nix { };
     openmp = callPackage ./pkgs/llvm-ompss2/openmp.nix { monorepoSrc = final.clangOmpss2Unwrapped.src; version = final.clangOmpss2Unwrapped.version; };

pkgs/amd-uprof/default.nix

@@ -1,8 +1,6 @@
 { stdenv
 , lib
-, curl
-, cacert
-, runCommandLocal
+, fetchurl
 , autoPatchelfHook
 , elfutils
 , glib
@@ -26,26 +24,22 @@ let
   tarball = "AMDuProf_Linux_x64_${version}.tar.bz2";
 
   # NOTE: Remember to update the radare2 patch below if AMDuProfPcm changes.
-  uprofSrc = runCommandLocal tarball {
-    nativeBuildInputs = [ curl ];
-    outputHash = "sha256-j9gxcBcIg6Zhc5FglUXf/VV9bKSo+PAKeootbN7ggYk=";
-    SSL_CERT_FILE="${cacert}/etc/ssl/certs/ca-bundle.crt";
-  } ''
-    curl \
-    -o $out \
-    'https://download.amd.com/developer/eula/uprof/uprof-5-1/${tarball}' \
-    -H 'User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0' \
-    -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' \
-    -H 'Accept-Language: en-US,en;q=0.5' \
-    -H 'Accept-Encoding: gzip, deflate, br, zstd' \
-    -H 'Referer: https://www.amd.com/' 2>&1 | tr '\r' '\n'
-  '';
+  src = fetchurl {
+    url = "https://download.amd.com/developer/eula/uprof/uprof-5-1/${tarball}";
+    sha256 = "sha256-j9gxcBcIg6Zhc5FglUXf/VV9bKSo+PAKeootbN7ggYk=";
+    curlOptsList = [
+      "-H" "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0"
+      "-H" "'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'"
+      "-H" "Accept-Language: en-US,en;q=0.5"
+      "-H" "Accept-Encoding: gzip, deflate, br, zstd"
+      "-H" "Referer: https://www.amd.com/"
+    ];
+  };
 
 in
   stdenv.mkDerivation {
     pname = "AMD-uProf";
-    inherit version;
-    src = uprofSrc;
+    inherit src version;
     dontStrip = true;
     phases = [ "installPhase" "fixupPhase" ];
     nativeBuildInputs = [ autoPatchelfHook radare2 ];

pkgs/nanos6/jemalloc.nix

@@ -5,6 +5,7 @@ jemalloc.overrideAttrs (old: {
     "--with-jemalloc-prefix=nanos6_je_"
     "--enable-stats"
   ];
+  enableParallelBuilding = true;
   hardeningDisable = [ "all" ];
   meta = old.meta // {
     description = old.meta.description + " (for Nanos6)";

pkgs/nix-portable/default.nix

@@ -0,0 +1,650 @@
+with builtins;
+{
+  nix,
+  unzip,
+  zip,
+  unixtools,
+  stdenv,
+  buildPackages,
+  upx,
+
+  bootstrapPrograms ? [
+    "gitMinimal"
+    "netcat-openbsd"
+    "openssh"
+    "bashInteractive"
+  ],
+
+  cacert ? pkgs.cacert,
+  compression ? "zstd -19 -T0",
+  lib ? pkgs.lib,
+  pkgs ? import <nixpkgs> {},
+  # hardcode executable to run. Useful when creating a bundle.
+  bundledPackage ? null,
+
+  nixStatic,
+  busyboxStatic ? pkgs.pkgsStatic.busybox,
+  bwrapStatic ? pkgs.pkgsStatic.bubblewrap,
+  zstdStatic ? pkgs.pkgsStatic.zstd,
+
+  perlBuildBuild ? pkgs.pkgsBuildBuild.perl,
+}@inp:
+with lib;
+let
+
+  perl = perlBuildBuild;
+
+  pname =
+    if bundledPackage == null
+    then "nix-portable"
+    else lib.getName bundledPackage;
+
+  bundledExe = lib.getExe bundledPackage;
+
+  nixpkgsSrc = pkgs.path;
+
+  maketar = targets:
+    let
+      closureInfo = buildPackages.closureInfo { rootPaths = targets; };
+    in
+    stdenv.mkDerivation {
+      name = "nix-portable-store-tarball";
+      nativeBuildInputs = [ perl zstd ];
+      exportReferencesGraph = map (x: [("closure-" + baseNameOf x) x]) targets;
+      buildCommand = ''
+        storePaths=$(cat ${closureInfo}/store-paths)
+        mkdir $out
+        echo $storePaths > $out/index
+        cp -r ${closureInfo} $out/closureInfo
+
+        tar -cf - \
+          --owner=0 --group=0 --mode=u+rw,uga+r \
+          --hard-dereference \
+          $storePaths | ${compression} > $out/tar
+      '';
+    };
+
+  packStaticBin = binPath: let
+      binName = (last (splitString "/" binPath)); in
+    pkgs.runCommand
+    binName
+    { nativeBuildInputs = [ upx ]; }
+    ''
+      mkdir -p $out/bin
+      theBinPath=${binPath}
+
+      if [[ -L "$theBinPath" ]]; then
+        theBinPath=$(readlink -f "$theBinPath")
+      fi
+
+      upx -9 -o $out/bin/${binName} $theBinPath
+    '';
+
+  installBin = pkg: bin: ''
+    unzip -qqoj "\$self" ${ lib.removePrefix "/" "${pkg}/bin/${bin}"} -d \$dir/bin
+    chmod +wx \$dir/bin/${bin};
+  '';
+
+  installDynamic = pkgname: let
+    out = pkgs.${pkgname}.out;
+  in ''
+    if [ ! -e \$store${lib.removePrefix "/nix/store" pkgs.${pkgname}.out} ] ; then
+      debug "Installing ${pkgname}"
+      \$run \$store${lib.removePrefix "/nix/store" nix}/bin/nix build --impure --no-link --expr "
+        (import ${nixpkgsSrc} {}).${pkgname}.out
+      "
+    else
+      debug "${pkgname} already installed"
+    fi
+
+    export PATH="${out}/bin:\$PATH"
+  '';
+
+  caBundleZstd = pkgs.runCommand "cacerts" {} "cat ${cacert}/etc/ssl/certs/ca-bundle.crt | ${zstd}/bin/zstd -19 > $out";
+
+  bwrap = packStaticBin "${bwrapStatic}/bin/bwrap";
+  nixStatic = packStaticBin "${inp.nixStatic}/bin/nix";
+  zstd = packStaticBin "${zstdStatic}/bin/zstd";
+
+  # the default nix store contents to extract when first used
+  storeTar = maketar ([ cacert nix nixpkgsSrc ] ++ lib.optional (bundledPackage != null) bundledPackage);
+
+
+  # The runtime script which unpacks the necessary files to $HOME/.nix-portable
+  # and then executes nix via bwrap
+  # Some shell expressions will be evaluated at build time and some at run time.
+  # Variables/expressions escaped via `\$` will be evaluated at run time
+  runtimeScript = ''
+    #!/usr/bin/env bash
+
+    set -eo pipefail
+
+    start=\$(date +%s%N)  # start time in nanoseconds
+
+    # dump environment on exit if debug is enabled
+    if [ -n "\$NP_DEBUG" ] && [ "\$NP_DEBUG" -ge 1 ]; then
+      trap "declare -p > \''${TMPDIR:-/tmp}/np_env" EXIT
+    fi
+
+    set -e
+    if [ -n "\$NP_DEBUG" ] && [ "\$NP_DEBUG" -ge 2 ]; then
+      set -x
+    fi
+
+    # &3 is our error out which we either forward to &2 or to /dev/null
+    # depending on the setting
+    if [ -n "\$NP_DEBUG" ] && [ "\$NP_DEBUG" -ge 1 ]; then
+      debug(){
+        echo \$@ || true
+      }
+      exec 3>&2
+    else
+      debug(){
+        true
+      }
+      exec 3>/dev/null
+    fi
+
+    # to reference this script's file
+    self="\$(realpath \''${BASH_SOURCE[0]})"
+
+    # fingerprint will be inserted by builder
+    fingerprint="_FINGERPRINT_PLACEHOLDER_"
+
+    # user specified location for program files and nix store
+    [ -z "\$NP_LOCATION" ] && NP_LOCATION="\$HOME"
+    NP_LOCATION="\$(readlink -f "\$NP_LOCATION")"
+    dir="\$NP_LOCATION/.nix-portable"
+
+    # Create NP_LOCATION and remove sgid bit
+    mkdir -p \$dir
+    if [ ! -z "\$BSC_MACHINE" ]; then
+      # Attempt to avoid issues with sgid folders
+      chmod g-s \$dir
+      chgrp bsc \$dir
+    fi
+
+    store="\$dir/nix/store"
+    # create /nix/var/nix to prevent nix from falling back to chroot store.
+    mkdir -p \$dir/{bin,nix/var/nix,nix/store}
+
+    # create minimal drv file for nix to spawn a nix shell
+    echo 'builtins.derivation {name="foo"; builder="/bin/sh"; args = ["-c" "echo hello \> \\\$out"]; system=builtins.currentSystem;}' > "\$dir/mini-drv.nix"
+
+    # the fingerprint being present inside a file indicates that
+    # this version of nix-portable has already been initialized
+    if test -e \$dir/conf/fingerprint && [ "\$(cat \$dir/conf/fingerprint)" == "\$fingerprint" ]; then
+      newNPVersion=false
+    else
+      newNPVersion=true
+    fi
+
+    # Nix portable ships its own nix.conf
+    export NIX_CONF_DIR=\$dir/conf/
+
+    NP_CONF_SANDBOX=\''${NP_CONF_SANDBOX:-false}
+    NP_CONF_STORE=\''${NP_CONF_STORE:-auto}
+
+
+    recreate_nix_conf(){
+      mkdir -p "\$NIX_CONF_DIR"
+      rm -f "\$NIX_CONF_DIR/nix.conf"
+
+      # static config
+      echo "build-users-group = " >> \$dir/conf/nix.conf
+      echo "experimental-features = nix-command flakes" >> \$dir/conf/nix.conf
+      echo "ignored-acls = security.selinux system.nfs4_acl" >> \$dir/conf/nix.conf
+      echo "sandbox-paths = /bin/sh=\$dir/busybox/bin/busybox" >> \$dir/conf/nix.conf
+      echo "extra-substituters = https://jungle.bsc.es/cache">> \$dir/conf/nix.conf
+      echo "extra-trusted-public-keys = jungle.bsc.es:pEc7MlAT0HEwLQYPtpkPLwRsGf80ZI26aj29zMw/HH0=" >> \$dir/conf/nix.conf
+
+      echo "extra-system-features = sys-devices" >> \$dir/conf/nix.conf
+      echo "extra-sandbox-paths = /sys/devices/system/cpu=/sys/devices/system/cpu /sys/devices/system/node=/sys/devices/system/node" >> \$dir/conf/nix.conf
+      echo "extra-trusted-users = @bsc" >> \$dir/conf/nix.conf
+
+
+      # configurable config
+      echo "sandbox = \$NP_CONF_SANDBOX" >> \$dir/conf/nix.conf
+      echo "store = \$NP_CONF_STORE" >> \$dir/conf/nix.conf
+    }
+
+
+    ### install files
+
+    PATH_OLD="\$PATH"
+
+    # as soon as busybox is unpacked, restrict PATH to busybox to ensure reproducibility of this script
+    # only unpack binaries if necessary
+    if [ "\$newNPVersion" == "false" ]; then
+
+      debug "binaries already installed"
+      # our busybox does not run on termux, therefore we suffix the PATH only on termux
+      export PATH="\''${TERMUX_VERSION:+\$PATH:}\$dir/busybox/bin"
+
+    else
+
+      debug "installing files"
+
+      mkdir -p \$dir/emptyroot
+
+      # install busybox
+      mkdir -p \$dir/busybox/bin
+      (base64 -d> "\$dir/busybox/bin/busybox" && chmod +x "\$dir/busybox/bin/busybox") << END
+    $(cat ${busyboxStatic}/bin/busybox | base64)
+    END
+      busyBins="${toString (attrNames (filterAttrs (d: type: type == "symlink") (readDir "${busyboxStatic}/bin")))}"
+      for bin in \$busyBins; do
+        [ ! -e "\$dir/busybox/bin/\$bin" ] && ln -s busybox "\$dir/busybox/bin/\$bin"
+      done
+
+      # our busybox does not run on termux, therefore we suffix the PATH only on termux
+      export PATH="\''${TERMUX_VERSION:+\$PATH:}\$dir/busybox/bin"
+
+      # install other binaries
+      ${installBin zstd "zstd"}
+      ${installBin bwrap "bwrap"}
+      ${installBin nixStatic "nix"}
+
+      # install ssl cert bundle
+      unzip -poj "\$self" ${ lib.removePrefix "/" "${caBundleZstd}"} | \$dir/bin/zstd -d > \$dir/ca-bundle.crt
+
+      recreate_nix_conf
+    fi
+
+    # Override $SHELL with nix bashInteractive
+    export SHELL="${pkgs.bashInteractive.out}/bin/bash"
+    export PS1="\n\[\033[1;32m\][\[\e]0;\u@\h: \w\a\]\u@\h:\w]\$\[\033[0m\] "
+
+    # unset bash function aliases
+    unset -f which ml module
+
+    ### setup SSL
+    # find ssl certs or use from nixpkgs
+    debug "figuring out ssl certs"
+    if [ -z "\$SSL_CERT_FILE" ]; then
+      debug "SSL_CERT_FILE not defined. trying to find certs automatically"
+      if [ -e /etc/ssl/certs/ca-bundle.crt ]; then
+        export SSL_CERT_FILE=\$(realpath /etc/ssl/certs/ca-bundle.crt)
+        debug "found /etc/ssl/certs/ca-bundle.crt with real path \$SSL_CERT_FILE"
+      elif [ -e /etc/ssl/certs/ca-certificates.crt ]; then
+        export SSL_CERT_FILE=\$(realpath /etc/ssl/certs/ca-certificates.crt)
+        debug "found /etc/ssl/certs/ca-certificates.crt with real path \$SSL_CERT_FILE"
+      elif [ ! -e /etc/ssl/certs ]; then
+        debug "/etc/ssl/certs does not exist. Will use certs from nixpkgs."
+        export SSL_CERT_FILE=\$dir/ca-bundle.crt
+      else
+        debug "certs seem to reside in /etc/ssl/certs. No need to set up anything"
+      fi
+    fi
+    if [ -n "\$SSL_CERT_FILE" ]; then
+      sslBind="\$(realpath \$SSL_CERT_FILE) \$dir/ca-bundle.crt"
+      export SSL_CERT_FILE="\$dir/ca-bundle.crt"
+    else
+      sslBind="/etc/ssl /etc/ssl"
+    fi
+
+    if [ -n "\$NP_GIT" ]; then
+      echo "WARN: NP_GIT is not supported, using nix version instead"
+    fi
+
+
+
+    storePathOfFile(){
+      file=\$(realpath \$1)
+      sPath="\$(echo \$file | awk -F "/" 'BEGIN{OFS="/";}{print \$2,\$3,\$4}')"
+      echo "/\$sPath"
+    }
+
+
+    collectBinds(){
+      pathsTopLevel="/boot /run /sys \$PWD /gpfs /tmp /scratch"
+
+      toBind=""
+      for p in \$pathsTopLevel; do
+        if [ -e "\$p" ]; then
+          real=\$(realpath \$p)
+          if [ -e "\$real" ]; then
+            if [[ "\$real" == /nix/store/* ]]; then
+              storePath=\$(storePathOfFile \$real)
+              toBind="\$toBind \$storePath \$storePath"
+            else
+              toBind="\$toBind \$real \$p"
+            fi
+          fi
+        fi
+      done
+
+
+      # TODO: add /var/run/dbus/system_bus_socket
+      paths="/etc/host.conf /etc/hosts /etc/hosts.equiv /etc/mtab /etc/netgroup /etc/networks /etc/passwd /etc/group /etc/nsswitch.conf /etc/resolv.conf /etc/localtime \$HOME"
+
+      for p in \$paths; do
+        if [ -e "\$p" ]; then
+          real=\$(realpath \$p)
+          if [ -e "\$real" ]; then
+            if [[ "\$real" == /nix/store/* ]]; then
+              storePath=\$(storePathOfFile \$real)
+              toBind="\$toBind \$storePath \$storePath"
+            else
+              toBind="\$toBind \$real \$real"
+            fi
+          fi
+        fi
+      done
+
+      # provide /bin/sh via the shipped busybox
+      toBind="\$toBind \$dir/busybox/bin/busybox /bin/sh"
+      toBind="\$toBind \$dir/busybox/bin/busybox /usr/bin/env"
+
+      # on termux, make sure termux packages still work inside the nix-portable environment
+      if [ -n "\$TERMUX_VERSION" ]; then
+        # binds required so termux native packages still run inside the nix-portable sandbox
+        # TODO: this doesn't quite work yet. debug and fix
+        toBind="\$toBind /system/lib64/libc.so /system/lib64/libc.so"
+        toBind="\$toBind /system/lib64/ld-android.so /system/lib64/ld-android.so"
+        toBind="\$toBind /system/lib64/libdl.so /system/lib64/libdl.so"
+        toBind="\$toBind /system/bin /system/bin"
+        toBind="\$toBind /system/lib64 /system/lib64"
+        toBind="\$toBind /apex/com.android.runtime/bin /apex/com.android.runtime/bin"
+        toBind="\$toBind /linkerconfig/ld.config.txt /linkerconfig/ld.config.txt"
+        toBind="\$toBind \$dir/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt"
+        toBind="\$toBind \$(realpath \$HOME/../usr/etc/resolv.conf) /etc/resolv.conf"
+      fi
+
+    }
+
+
+    makeBindArgs(){
+      arg=\$1; shift
+      sep=\$1; shift
+      binds=""
+      while :; do
+        if [ -n "\$1" ]; then
+          from="\$1"; shift
+          to="\$1"; shift || { echo "no bind destination provided for \$from!"; exit 3; }
+          binds="\$binds \$arg \$from\$sep\$to";
+        else
+          break
+        fi
+      done
+    }
+
+
+
+    ### select container runtime
+    debug "figuring out which runtime to use"
+    [ -z "\$NP_BWRAP" ] && NP_BWRAP=\$dir/bin/bwrap
+    debug "bwrap executable: \$NP_BWRAP"
+    [ -z "\$NP_NIX" ] && NP_NIX=\$dir/bin/nix
+    debug "nix executable: \$NP_NIX"
+    debug "testing all available runtimes..."
+    if [ -z "\$NP_RUNTIME" ]; then
+      # read last automatic selected runtime from disk
+      if [ "\$newNPVersion" == "true" ]; then
+        debug "removing cached auto selected runtime"
+        rm -f "\$dir/conf/last_auto_runtime"
+      fi
+      if [ -f "\$dir/conf/last_auto_runtime" ]; then
+        last_auto_runtime="\$(cat "\$dir/conf/last_auto_runtime")"
+      else
+        last_auto_runtime=
+      fi
+      debug "last auto selected runtime: \$last_auto_runtime"
+      if [ "\$last_auto_runtime" != "" ]; then
+        NP_RUNTIME="\$last_auto_runtime"
+      # check if nix --store works
+      elif \\
+          debug "testing nix --store" \\
+          && mkdir -p \$dir/tmp/ \\
+          && touch \$dir/tmp/testfile \\
+          && "\$NP_NIX" --store "\$dir/tmp/__store" shell -f "\$dir/mini-drv.nix" -c "\$dir/bin/nix" store add-file --store "\$dir/tmp/__store" "\$dir/tmp/testfile" >/dev/null 2>&3; then
+        chmod -R +w \$dir/tmp/__store
+        rm -r \$dir/tmp/__store
+        debug "nix --store works on this system -> will use nix as runtime"
+        NP_RUNTIME=nix
+      # check if bwrap works properly
+      elif \\
+          debug "nix --store failed -> testing bwrap" \\
+          && \$NP_BWRAP --bind \$dir/emptyroot / --bind \$dir/ /nix --bind \$dir/busybox/bin/busybox "\$dir/true" "\$dir/true" 2>&3 ; then
+        debug "bwrap seems to work on this system -> will use bwrap"
+        NP_RUNTIME=bwrap
+      else
+        debug "bwrap doesn't work on this system -> will use proot"
+        NP_RUNTIME=proot
+      fi
+      echo -n "\$NP_RUNTIME" > "\$dir/conf/last_auto_runtime"
+    else
+      debug "runtime selected via NP_RUNTIME: \$NP_RUNTIME"
+    fi
+    debug "NP_RUNTIME: \$NP_RUNTIME"
+    if [ "\$NP_RUNTIME" == "nix" ]; then
+      run="\$NP_NIX shell -f \$dir/mini-drv.nix -c"
+      export PATH="\$PATH:\$store${lib.removePrefix "/nix/store" nix}/bin"
+      NP_CONF_STORE="\$dir"
+      recreate_nix_conf
+    elif [ "\$NP_RUNTIME" == "bwrap" ]; then
+      collectBinds
+      makeBindArgs --bind " " \$toBind \$sslBind
+      run="\$NP_BWRAP \$BWRAP_ARGS \\
+        --bind \$dir/emptyroot /\\
+        --dev-bind /dev /dev\\
+        --proc /proc\\
+        --bind \$dir/nix /nix\\
+        \$binds"
+        # --bind \$dir/busybox/bin/busybox /bin/sh\\
+    else
+      # proot
+      echo Unsupported runtime: $NP_RUNTIME
+      exit 1
+    fi
+    debug "base command will be: \$run"
+
+
+
+    ### setup environment
+    export NIX_PATH="\$dir/channels:nixpkgs=\$dir/channels/nixpkgs"
+    mkdir -p \$dir/channels
+    [ -h \$dir/channels/nixpkgs ] || ln -s ${nixpkgsSrc} \$dir/channels/nixpkgs
+
+
+    ### install nix store
+    # Install all the nix store paths necessary for the current nix-portable version
+    # We only unpack missing store paths from the tar archive.
+    index="$(cat ${storeTar}/index)"
+
+    export missing=\$(
+      for path in \$index; do
+        basepath=\$(basename \$path)
+        if [ ! -e \$store/\$basepath ]; then
+          echo "nix/store/\$basepath"
+        fi
+      done
+    )
+
+    if [ -n "\$missing" ]; then
+      debug "extracting missing store paths"
+      (
+        mkdir -p \$dir/tmp \$store/
+        rm -rf \$dir/tmp/*
+        cd \$dir/tmp
+        unzip -qqp "\$self" ${ lib.removePrefix "/" "${storeTar}/tar"} \
+          | \$dir/bin/zstd -d \
+          | tar -x \$missing --strip-components 2
+        mv \$dir/tmp/* \$store/
+      )
+      rm -rf \$dir/tmp
+    fi
+
+    if [ -n "\$missing" ]; then
+      debug "registering new store paths to DB"
+      reg="$(cat ${storeTar}/closureInfo/registration)"
+      cmd="\$run \$store${lib.removePrefix "/nix/store" nix}/bin/nix-store --load-db"
+      debug "running command: \$cmd"
+      echo "\$reg" | \$cmd
+    fi
+
+
+    ### select executable
+    # the executable can either be selected by
+    # - executing './nix-portable BIN_NAME',
+    # - symlinking to nix-portable, in which case the name of the symlink selects the nix executable
+    # Alternatively the executable can be hardcoded by specifying the argument 'executable' of nix-portable's default.nix file.
+    executable="${if bundledPackage == null then "" else bundledExe}"
+    if [ "\$executable" != "" ]; then
+      bin="\$executable"
+      debug "executable is hardcoded to: \$bin"
+
+    elif [[ "\$(basename \$0)" == nix-portable* ]]; then\
+      if [ -z "\$1" ]; then
+        echo "Error: please specify the nix binary to execute"
+        echo "Alternatively symlink against \$0"
+        exit 1
+      elif [ "\$1" == "debug" ]; then
+        bin="\$(which \$2)"
+        shift; shift
+      else
+        bin="\$store${lib.removePrefix "/nix/store" nix}/bin/\$1"
+        shift
+      fi
+    # for binary selection via symlink
+    else
+      bin="\$store${lib.removePrefix "/nix/store" nix}/bin/\$(basename \$0)"
+    fi
+
+
+
+    ### check which runtime has been used previously
+    if [ -f "\$dir/conf/last_runtime" ]; then
+      lastRuntime=\$(cat "\$dir/conf/last_runtime")
+    else
+      lastRuntime=
+    fi
+
+
+
+    ### check if nix is functional with or without sandbox
+    # sandbox-fallback is not reliable: https://github.com/NixOS/nix/issues/4719
+    if [ "\$newNPVersion" == "true" ] || [ "\$lastRuntime" != "\$NP_RUNTIME" ]; then
+      nixBin="\$(dirname \$bin)/nix"
+      debug "Testing if nix can build stuff without sandbox"
+      if ! \$run "\$nixBin" build --no-link -f "\$dir/mini-drv.nix" --option sandbox false >&3 2>&3; then
+        echo "Fatal error: nix is unable to build packages"
+        exit 1
+      fi
+
+      debug "Testing if nix sandbox is functional"
+      if ! \$run "\$nixBin" build --no-link -f "\$dir/mini-drv.nix" --option sandbox true >&3 2>&3; then
+        debug "Sandbox doesn't work -> disabling sandbox"
+        NP_CONF_SANDBOX=false
+        recreate_nix_conf
+      else
+        debug "Sandboxed builds work -> enabling sandbox"
+        NP_CONF_SANDBOX=true
+        recreate_nix_conf
+      fi
+
+    fi
+
+
+    ### save fingerprint and lastRuntime
+    if [ "\$newNPVersion" == "true" ]; then
+      echo -n "\$fingerprint" > "\$dir/conf/fingerprint"
+    fi
+    if [ "\$lastRuntime" != \$NP_RUNTIME ]; then
+      echo -n \$NP_RUNTIME > "\$dir/conf/last_runtime"
+    fi
+
+
+
+    ### set PATH
+    export PATH="\$dir/busybox/bin"
+    export PATH="\$PATH:\$store${lib.removePrefix "/nix/store" nix}/bin"
+
+    ### install programs via nix
+    ${concatMapStringsSep "\n" installDynamic bootstrapPrograms}
+
+    ### print elapsed time
+    end=\$(date +%s%N)  # end time in nanoseconds
+    # time elapsed in millis with two decimal places
+
+    # print stats about initialization time of nix-portable
+    # skipt for termux, as it doesn't have bc installed
+    if [ -z "\$TERMUX_VERSION" ]; then
+      elapsed=\$(echo "scale=2; (\$end - \$start)/1000000" | bc)
+      debug "Time to initialize nix-portable: \$elapsed millis"
+    fi
+
+
+    ### run commands
+    [ -z "\$NP_RUN" ] && NP_RUN="\$run"
+    if [ "\$NP_RUNTIME" == "proot" ]; then
+      debug "running command: \$NP_RUN \$bin \$@"
+      exec \$NP_RUN \$bin "\$@"
+    else
+      cmd="\$NP_RUN \$bin \$@"
+      debug "running command: \$cmd"
+      exec \$NP_RUN \$bin "\$@"
+    fi
+    exit
+  '';
+
+  runtimeScriptEscaped = replaceStrings ["\""] ["\\\""] runtimeScript;
+
+  nixPortable = pkgs.runCommand pname {
+    nativeBuildInputs = [unixtools.xxd unzip];
+
+    meta = {
+      homepage = "https://github.com/DavHau/nix-portable";
+      description = "Nix - Static, Permissionless, Installation-free, Pre-configured for mn5";
+      maintainers = with lib.maintainers.bsc; [ abonerib ];
+      platforms = lib.platforms.linux;
+      license = lib.licenses.mit;
+    };
+  } ''
+    mkdir -p $out/bin
+    echo "${runtimeScriptEscaped}" > $out/bin/nix-portable.zip
+    xxd $out/bin/nix-portable.zip | tail
+
+    sizeA=$(printf "%08x" `stat -c "%s" $out/bin/nix-portable.zip` | tac -rs ..)
+    echo 504b 0304 0000 0000 0000 0000 0000 0000 | xxd -r -p >> $out/bin/nix-portable.zip
+    echo 0000 0000 0000 0000 0000 0200 0000 4242 | xxd -r -p >> $out/bin/nix-portable.zip
+
+    sizeB=$(printf "%08x" `stat -c "%s" $out/bin/nix-portable.zip` | tac -rs ..)
+    echo 504b 0102 0000 0000 0000 0000 0000 0000 | xxd -r -p >> $out/bin/nix-portable.zip
+    echo 0000 0000 0000 0000 0000 0000 0200 0000 | xxd -r -p >> $out/bin/nix-portable.zip
+    echo 0000 0000 0000 0000 0000 $sizeA 4242 | xxd -r -p >> $out/bin/nix-portable.zip
+
+    echo 504b 0506 0000 0000 0000 0100 3000 0000 | xxd -r -p >> $out/bin/nix-portable.zip
+    echo $sizeB 0000 0000 0000 0000 0000 0000 | xxd -r -p >> $out/bin/nix-portable.zip
+
+    unzip -vl $out/bin/nix-portable.zip
+
+    zip="${zip}/bin/zip -0"
+    $zip $out/bin/nix-portable.zip ${bwrap}/bin/bwrap
+    $zip $out/bin/nix-portable.zip ${nixStatic}/bin/nix
+    $zip $out/bin/nix-portable.zip ${zstd}/bin/zstd
+    $zip $out/bin/nix-portable.zip ${storeTar}/tar
+    $zip $out/bin/nix-portable.zip ${caBundleZstd}
+
+    # create fingerprint
+    fp=$(sha256sum $out/bin/nix-portable.zip | cut -d " "  -f 1)
+    sed -i "s/_FINGERPRINT_PLACEHOLDER_/$fp/g" $out/bin/nix-portable.zip
+    # fix broken zip header due to manual modification
+    ${zip}/bin/zip -F $out/bin/nix-portable.zip --out $out/bin/nix-portable-fixed.zip
+
+    rm $out/bin/nix-portable.zip
+    executable=${if bundledPackage == null then "" else bundledExe}
+    if [ "$executable" == "" ]; then
+      target="$out/bin/nix-portable"
+    else
+      target="$out/bin/$(basename "$executable")"
+    fi
+    mv $out/bin/nix-portable-fixed.zip "$target"
+    chmod +x "$target"
+  '';
+in
+nixPortable.overrideAttrs (prev: {
+  passthru = (prev.passthru or {}) // {
+    inherit bwrap;
+  };
+})

pkgs/nix-wrap/default.nix

@@ -14,7 +14,7 @@ let
   nixConfDir = "share";
   nix_wrap_sh = writeText "nix-wrap.sh" ''
     #!/usr/bin/env bash
-    #
+
     busybox_bin="${nixPrefix}${busybox}/bin"
     bubblewrap_bin="${nixPrefix}/${bubblewrap}/bin"
 
@@ -69,7 +69,6 @@ stdenv.mkDerivation rec {
   name = "nix-wrap";
   buildInputs = [
     bashInteractive
-    busybox
     nix
   ];
   src = null;
@@ -92,7 +91,6 @@ stdenv.mkDerivation rec {
     homepage = null;
     description = "nix bubblewrap wrapper";
     maintainers = [ ];
-    broken = true;
     platforms = lib.platforms.linux;
     license = lib.licenses.mit;
   };