diff --git a/archrepo2/lib/archpkg.py b/archrepo2/lib/archpkg.py
index b0bdaf9..7c9600b 100644
--- a/archrepo2/lib/archpkg.py
+++ b/archrepo2/lib/archpkg.py
@@ -1,17 +1,19 @@
+from __future__ import annotations
+
 import os
 from collections import namedtuple
 import subprocess
 import re
 from typing import List, Dict
 
-from pyalpm import vercmp
+import pyalpm
 
 class PkgNameInfo(namedtuple('PkgNameInfo', 'name, version, release, arch')):
   def __lt__(self, other) -> bool:
     if self.name != other.name or self.arch != other.arch:
       return NotImplemented
     if self.version != other.version:
-      return vercmp(self.version, other.version) < 0
+      return pyalpm.vercmp(self.version, other.version) < 0
     return float(self.release) < float(other.release)
 
   def __gt__(self, other) -> bool:
@@ -36,52 +38,24 @@ def get_pkgname_with_bash(PKGBUILD: str) -> List[str]:
 . '%s'
 echo ${pkgname[*]}''' % PKGBUILD
   # Python 3.4 has 'input' arg for check_output
-  p = subprocess.Popen(['bash'], stdin=subprocess.PIPE,
-                       stdout=subprocess.PIPE)
-  output = p.communicate(script.encode('latin1'))[0].decode('latin1')
+  p = subprocess.Popen(
+    ['bwrap', '--unshare-all', '--ro-bind', '/', '/', '--tmpfs', '/home',
+     '--tmpfs', '/run', '--die-with-parent',
+     '--tmpfs', '/tmp', '--proc', '/proc', '--dev', '/dev', '/bin/bash'],
+    stdin=subprocess.PIPE, stdout=subprocess.PIPE,
+  )
+  output = p.communicate(script.encode())[0].decode()
   ret = p.wait()
   if ret != 0:
     raise subprocess.CalledProcessError(
       ret, ['bash'], output)
   return output.split()
 
-def _run_bash(script: str) -> None:
-  p = subprocess.Popen(['bash'], stdin=subprocess.PIPE)
-  p.communicate(script.encode('latin1'))
-  ret = p.wait()
-  if ret != 0:
-    raise subprocess.CalledProcessError(
-      ret, ['bash'])
-
-def get_aur_pkgbuild_with_bash(name: str) -> None:
-  script = '''\
-. /usr/lib/yaourt/util.sh
-. /usr/lib/yaourt/aur.sh
-init_color
-aur_get_pkgbuild '%s' ''' % name
-  _run_bash(script)
-
-def get_abs_pkgbuild_with_bash(name: str) -> None:
-  script = '''\
-. /usr/lib/yaourt/util.sh
-. /usr/lib/yaourt/abs.sh
-init_paths
-init_color
-arg=$(pacman -Sp --print-format '%%r/%%n' '%s')
-RSYNCOPT="$RSYNCOPT -O"
-abs_get_pkgbuild "$arg" ''' % name
-  _run_bash(script)
-
 pkgfile_pat = re.compile(r'(?:^|/).+-[^-]+-[\d.]+-(?:\w+)\.pkg\.tar\.(?:xz|zst)$')
 
 def _strip_ver(s: str) -> str:
   return re.sub(r'[<>=].*', '', s)
 
-def get_package_dependencies(name: str) -> List[str]:
-  outb = subprocess.check_output(["package-query", "-Sii", "-f", "%D", name])
-  out = outb.decode('latin1')
-  return [_strip_ver(x) for x in out.split() if x != '-']
-
 def get_package_info(name: str, local: bool = False) -> Dict[str, str]:
   old_lang = os.environ['LANG']
   os.environ['LANG'] = 'C'
@@ -105,14 +79,3 @@ def get_package_info(name: str, local: bool = False) -> Dict[str, str]:
       ret[key] += ' ' + l.strip()
   return ret
 
-def get_package_repository(name: str) -> str:
-  try:
-    out = subprocess.check_output(["package-query", "-Sii", "-f", "%r", name])
-    repo = out.strip().decode('latin1')
-  except subprocess.CalledProcessError:
-    repo = 'local'
-  return repo
-
-def is_official(name: str) -> bool:
-  repo = get_package_repository(name)
-  return repo in ('core', 'extra', 'community', 'multilib', 'testing')