diff --git a/generate_bootstrap_zipball b/generate_bootstrap_zipball
deleted file mode 100755
index 42a0d29..0000000
--- a/generate_bootstrap_zipball
+++ /dev/null
@@ -1,296 +0,0 @@
-#!/usr/bin/env bash
-
-# This script builds the initial bootstrap zipball for Nix on Android.
-# Copyright (c) 2019 Alexander Sosedkin <monk@unboiled.info>
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License as published
-# by the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-set -uex
-
-ARCH=${1:-aarch64}
-
-ARCHIVE=nix-2.2.2-$ARCH-linux.tar.bz2
-BASEURL=https://nixos.org/releases/nix/nix-2.2.2
-URL="$BASEURL/$ARCHIVE"
-INST="/data/data/com.termux.nix/files/usr"
-
-export PROOT_NO_SECCOMP=1  # see https://github.com/proot-me/PRoot/issues/106
-
-rm -rf ./bootstrap
-mkdir -p bootstrap
-
-echo "building proot for $ARCH (this may take a lot of time...)"
-nix build -f proot.nix -o proot-$ARCH --argstr arch aarch64
-
-wget https://github.com/proot-me/proot-static-build/blob/master/static/proot-x86_64?raw=true -O proot-host
-chmod +x proot-host
-
-if [[ $ARCH != x86_64 && $ARCH != i686 ]]; then
-	wget https://github.com/multiarch/qemu-user-static/releases/download/v4.0.0-4/qemu-$ARCH-static -O qemu-$ARCH
-	chmod +x qemu-$ARCH
-fi
-
-echo "downloading nix archive"
-wget $URL -O $ARCHIVE
-
-echo -n "extracting $ARCHIVE "
-tar -xf "$ARCHIVE" -C bootstrap --checkpoint=200 --checkpoint-action=dot
-echo " done"
-mv bootstrap/nix* bootstrap/nix-installer
-
-echo -n "copying store... "
-mkdir bootstrap/nix
-cp -r bootstrap/nix-installer/store bootstrap/nix/
-echo "done"
-
-mkdir -p bootstrap/bin
-TGT_SHELL=$(find bootstrap/nix/store -path '*/bin/bash' | sed s/^bootstrap//)
-echo "shell found at $TGT_SHELL"
-ln -s "$TGT_SHELL" bootstrap/bin/sh
-
-mkdir -p bootstrap/usr/bin
-TGT_ENV=$(find bootstrap/nix/store -path '*/bin/env' | sed s/^bootstrap//)
-echo "env found at $TGT_ENV"
-ln -s "$TGT_ENV" bootstrap/usr/bin/env
-
-TGT_NIX=$(find bootstrap/nix/store -path '*/bin/nix' | sed s/^bootstrap//)
-TGT_NIX=${TGT_NIX%/bin/nix}
-echo "nix derivation found at $TGT_NIX"
-
-TGT_CACERT=$(find bootstrap/nix/store -path '*-nss-cacert-*/ca-bundle.crt' | sed s/^bootstrap//)
-echo "cacert found at $TGT_CACERT"
-
-if [[ $ARCH != x86_64 && $ARCH != i686 ]]; then
-	PROOT_CMD="./proot-host -q ./qemu-$ARCH -r bootstrap -w /"
-else
-	PROOT_CMD="./proot-host -b /dev -r bootstrap -w /"
-fi
-
-echo "initialising Nix database..."
-$PROOT_CMD "$TGT_NIX/bin/nix-store" --init
-
-echo "registering paths..."
-$PROOT_CMD "$TGT_NIX/bin/nix-store" --load-db < bootstrap/nix-installer/.reginfo
-
-echo "injecting proot..."
-mkdir -p bootstrap/bin
-cp proot-$ARCH/bin/proot bootstrap/bin/proot
-
-echo "making up some resolv.conf..."
-mkdir -p bootstrap/etc
-echo -e "nameserver 1.1.1.1\nnameserver 8.8.8.8" > bootstrap/etc/resolv.conf
-
-echo "disabling sandboxing..."  # we can't rely on USER_NS support
-mkdir -p bootstrap/etc/nix
-echo "sandbox = false " > bootstrap/etc/nix/nix.conf
-
-echo "composing login scripts..."
-mkdir -p bootstrap/bin
-mkdir -p bootstrap/root
-mkdir -p bootstrap/tmp
-mkdir -p bootstrap/.l2s
-cat > bootstrap/bin/login <<EOF
-#!/system/bin/sh
-set -e
-
-export USER=\$(/system/bin/whoami)
-export PROOT_TMP_DIR=$INST/tmp
-export PROOT_L2S_DIR=$INST/.l2s
-
-if [ ! -e $INST/etc/passwd ]; then
-	[ -n "$@" ] || echo "Creating /etc/passwd..."
-	echo "root:x:0:0:System administrator:$INST/root:/bin/sh" > $INST/etc/passwd
-	echo "nix-on-droid:x:\$(/system/bin/stat -c '%u:%g' $INST):nix-on-droid:/data/data/com.termux.nix/files/home:/bin/sh" >> $INST/etc/passwd
-fi
-
-exec $INST/bin/proot \
-	-b $INST/nix:/nix \
-	-b $INST/bin:/bin \
-	-b $INST/etc:/etc \
-	-b $INST/tmp:/tmp \
-	-b $INST/usr:/usr \
-	-b /:/android \
-	--link2symlink \
-	$INST/bin/sh $INST/bin/.login-inner \$USER "\$@"
-EOF
-
-chmod +x bootstrap/bin/login
-cat > bootstrap/bin/.login-inner <<EOF
-set -e
-
-[ "\$#" -gt 1 ] || echo "Welcome to Nix-on-Droid!"
-
-[ "\$#" -gt 1 ] || echo "If nothing works, use the rescue shell and read $INST/bin/.login-inner"
-[ "\$#" -gt 1 ] || echo "If it does not help, report bugs at https://github.com/t184256/nix-on-droid-bootstrap/issues"
-
-export USER="\$1"
-export HOME="/data/data/com.termux.nix/files/home"
-shift
-
-[ "\$#" -gt 0 ] || echo "Sourcing Nix environment..."
-. $INST/$TGT_NIX/etc/profile.d/nix.sh
-
-if [ ! -e \$HOME/.nix-profile/etc/ssl/certs/ca-bundle.crt ]; then
-	if [ -e $TGT_CACERT ]; then
-		export NIX_SSL_CERT_FILE=$TGT_CACERT
-	fi
-fi
-
-if [ -e "\$HOME/.nix-profile/etc/profile.d/hm-session-vars.sh" ]; then
-	[ "\$#" -gt 0 ] || echo "Sourcing home-manager environment..."
-	export NIX_PATH=\$HOME/.nix-defexpr/channels\${NIX_PATH:+:}\$NIX_PATH
-	. "\$HOME/.nix-profile/etc/profile.d/hm-session-vars.sh"
-fi
-
-if [ "\$#" -eq 0 ]; then
-	if [ ! -e "\$HOME/.nix-profile/etc/profile.d/hm-session-vars.sh" ]; then
-		echo "Congratulations. Now you have Nix installed, but that's kinda it."
-		echo "Hope you're a seasoned Nix user, because stuff is not pretty yet."
-		echo "If you wonder what to do next, and want to do it the hard way, start with running"
-		echo "  nix-channel --add https://nixos.org/channels/nixos-19.03 nixpkgs"
-		echo "  nix-channel --update"
-		echo "After that you can summon software from nixpkgs (e.g. gitMinimal):"
-		echo "* by asking for a shell that has it:"
-		echo "    nix run nixpkgs.bashInteractive nixpkgs.gitMinimal"
-		echo "* or installing it into the user environment (not recommended):"
-		echo "    nix-env -iA nixpkgs.gitMinimal"
-		echo "* or, the best way, declaratively with home-manager:"
-		echo "    0. nix-on-droid-install"
-		echo "    1. [get an editor and edit ~/.config/nixpkgs/home.nix]"
-		echo "    2. home-manager switch"
-		echo "or a myriad other ways."
-		echo "You should really consider installing at least: nix, cacert and coreutils."
-		echo "bashInteractive and a text editor should be high on the list too."
-		echo
-		echo "If you want the easy way, nix-on-droid-install should get all this covered."
-		echo
-		echo "TL;DR: run nix-on-droid-install and things will get better."
-		echo
-		echo "Dropping you into an extremely limited shell (that has Nix though). Happy hacking!"
-		export PATH="$TGT_NIX/bin:\$PATH"
-		exec /bin/sh
-	fi
-
-	echo "Dropping you into a shell. Happy hacking!"
-	exec /usr/bin/env bash
-else
-	exec /usr/bin/env "\$@"
-fi
-EOF
-chmod +x bootstrap/bin/.login-inner
-
-
-cat > bootstrap/bin/nix-on-droid-install <<EOF
-#!/bin/sh
-set -e
-
-if [ -e \$HOME/.nix-profile/etc/profile.d/hm-session-vars.sh ]; then
-	echo "You already have home-manager installed."
-fi
-
-echo "Installing home-manager and other good stuff..."
-
-echo "Subscribing to the stable (nixos-19.03) channel of nixpkgs..."
-echo "If you want unstable instead, you probably also know what to do."
-$TGT_NIX/bin/nix-channel --add https://nixos.org/channels/nixos-19.03 nixpkgs
-echo "Subscribing to home-manager channel..."
-$TGT_NIX/bin/nix-channel --add https://github.com/rycee/home-manager/archive/master.tar.gz home-manager
-echo "Updating channels..."
-$TGT_NIX/bin/nix-channel --update
-echo "Whew."
-
-export NIX_PATH=\$HOME/.nix-defexpr/channels\${NIX_PATH:+:}\$NIX_PATH
-
-if [ ! -e \$HOME/.config/nixpkgs/home.nix ]; then
-	echo "Creating an initial home-manager configuration in ~/.config/nixpkgs/home.nix ..."
-	$TGT_NIX/bin/nix run nixpkgs.coreutils -c mkdir -p \$HOME/.config/nixpkgs/
-	$TGT_NIX/bin/nix run nixpkgs.coreutils -c cp -n $INST/etc/home.nix.default \$HOME/.config/nixpkgs/home.nix
-fi
-
-echo "Installing home-manager..."
-$TGT_NIX/bin/nix run nixpkgs.nix -c $TGT_NIX/bin/nix-shell '<home-manager>' -A install
-
-echo "Edit ~/.config/nixpkgs/home.nix and home-manager rebuild to control what is going on."
-echo "Run bash or restart your session to enjoy a much nicer environment."
-EOF
-chmod +x bootstrap/bin/nix-on-droid-install
-
-
-echo "providing a default home-manager config..."
-
-cat > bootstrap/etc/home.nix.default <<EOF
-{ pkgs, ... }:
-
-{
-  # Let Home Manager install and manage itself.
-  programs.home-manager.enable = true;
-
-  # Install and configure software declaratively
-  #programs.git = {
-  #  enable = true;
-  #  userName = "Jane Doe";
-  #  userEmail = "jane.doe@example.org";
-  #};
-
-  # Simply install just the packages
-  home.packages = with pkgs; [
-    # Stuff that you really really want to have
-    nix cacert coreutils  # think twice before removing these
-
-    # User-facing stuff that you really really want to have
-    bashInteractive   # think twice before removing thes
-    vim  # or some other editor, e.g. nano or neovim
-
-    # Some common stuff that people expect to have
-    #diffutils
-    #findutils
-    #utillinux
-    #tzdata
-    #hostname
-    #man
-    #gnugrep
-    #gnupg
-    #gnused
-    #gnutar
-    #bzip2
-    #gzip
-    #xz
-    #zip
-    #unzip
-  ];
-}
-EOF
-
-echo "removing nix-installer..."
-rm -rf bootstrap/nix-installer
-
-echo "finding executables..."
-find bootstrap -executable -type f | \
-	sed s@^bootstrap/@@ \
-	> bootstrap/EXECUTABLES.txt
-
-echo "finding symlinks..."
-find bootstrap -type l |
-while read -r LINK; do
-	LNK=${LINK#bootstrap/}
-	TGT=$(readlink "$LINK")
-	echo "$TGT←$LNK" >> bootstrap/SYMLINKS.txt
-	rm "$LINK"
-done
-
-echo "packing..."
-rm -f bootstrap-$ARCH.zip
-(cd bootstrap; zip -q -9 -r ../bootstrap-$ARCH ./* ./.l2s)
-
-echo "done"
diff --git a/proot.nix b/proot.nix
deleted file mode 100644
index 1c40b5b..0000000
--- a/proot.nix
+++ /dev/null
@@ -1,121 +0,0 @@
-{arch}:
-
-let
-  pinnedPkgs = builtins.fetchTarball {
-    name = "nixos-19.03-2019-07-14";
-    url = https://github.com/nixos/nixpkgs/archive/cf16778cd6870d349581eb30e350ff2f95a55e06.tar.gz;
-    sha256 = "1xzsybpw5k68fima6pxpl7b3ifgisrm1cyci4hi10gvx9q8xj97z";
-  };
-
-  buildPkgs = import pinnedPkgs {};
-
-  overlay-jpeg-no-static = self: super: {
-    libjpeg = buildPkgs.libjpeg;
-  };
-
-  crossSystem = rec {
-    config = arch + "-unknown-linux-android";
-    sdkVer = "24";
-    ndkVer = "18b";
-    useAndroidPrebuilt = true;
-  };
-
-  crossPkgs = import pinnedPkgs { inherit crossSystem; };
-
-  crossStaticPkgs = import pinnedPkgs {
-    inherit crossSystem;
-    crossOverlays = [
-      (import "${pinnedPkgs}/pkgs/top-level/static.nix")
-      overlay-jpeg-no-static
-    ];
-  };
-
-  talloc = crossPkgs.stdenv.mkDerivation rec {
-    name = "talloc-2.1.14";
-
-    src = crossPkgs.fetchurl {
-      url = "mirror://samba/talloc/${name}.tar.gz";
-      sha256 = "1kk76dyav41ip7ddbbf04yfydb4jvywzi2ps0z2vla56aqkn11di";
-    };
-
-    depsBuildBuild = [ buildPkgs.python2 buildPkgs.zlib ];
-
-    buildDeps = [ crossPkgs.zlib ];
-
-    configurePhase = ''
-      substituteInPlace buildtools/bin/waf \
-          --replace "/usr/bin/env python" "${buildPkgs.python2}/bin/python"
-      ./configure --prefix=$out \
-          --disable-rpath \
-          --disable-python \
-          --cross-compile \
-          --cross-answers=cross-answers.txt
-    '';
-
-    buildPhase = ''
-      make
-    '';
-
-    installPhase = ''
-      mkdir -p $out/lib
-      make install
-      ${crossPkgs.stdenv.cc.targetPrefix}ar q $out/lib/libtalloc.a bin/default/talloc_[0-9]*.o
-    '';
-
-    fixupPhase = "";
-
-    prePatch = ''
-      cat <<EOF > cross-answers.txt
-      Checking uname sysname type: "Linux"
-      Checking uname machine type: "dontcare"
-      Checking uname release type: "dontcare"
-      Checking uname version type: "dontcare"
-      Checking simple C program: OK
-      building library support: OK
-      Checking for large file support: OK
-      Checking for -D_FILE_OFFSET_BITS=64: OK
-      Checking for WORDS_BIGENDIAN: OK
-      Checking for C99 vsnprintf: OK
-      Checking for HAVE_SECURE_MKSTEMP: OK
-      rpath library support: OK
-      -Wl,--version-script support: FAIL
-      Checking correct behavior of strtoll: OK
-      Checking correct behavior of strptime: OK
-      Checking for HAVE_IFACE_GETIFADDRS: OK
-      Checking for HAVE_IFACE_IFCONF: OK
-      Checking for HAVE_IFACE_IFREQ: OK
-      Checking getconf LFS_CFLAGS: OK
-      Checking for large file support without additional flags: OK
-      Checking for working strptime: OK
-      Checking for HAVE_SHARED_MMAP: OK
-      Checking for HAVE_MREMAP: OK
-      Checking for HAVE_INCOHERENT_MMAP: OK
-      Checking getconf large file support flags work: OK
-      EOF
-    '';
-  };
-
-
-  proot = crossStaticPkgs.stdenv.mkDerivation rec {
-    name = "proot-termux-${version}";
-    version = "2019-05-05";
-
-    src = crossStaticPkgs.fetchFromGitHub {
-      repo = "proot";
-      owner = "termux";
-      rev = "0717de26d1394fec3acf90efdc1d172e01bc932b";
-      sha256 = "1g0r3a67x94sgffz3gksyqk8r06zynfcgfdi33w6kzxnb03gbm4m";
-    };
-
-    buildInputs = [ talloc ];
-
-    makeFlags = [ "-Csrc CFLAGS=-D__ANDROID__" ];
-
-    installPhase = ''
-      mkdir -p $out/bin
-      cp src/proot $out/bin/
-    '';
-  };
-
-
-in proot