Try to use the new systemd-nspawn code paths

examples/guided.py

@@ -4,10 +4,10 @@ import os
 import time
 
 import archinstall
-from archinstall.lib.general import SysCommand
 from archinstall.lib.hardware import has_uefi
 from archinstall.lib.networking import check_mirror_reachable
 from archinstall.lib.profiles import Profile
+from archinstall.lib.systemd import Boot
 
 if archinstall.arguments.get('help'):
 	print("See `man archinstall` for help.")
@@ -187,10 +187,7 @@ def ask_user_questions():
 	if archinstall.arguments['profile'] and archinstall.arguments['profile'].has_prep_function():
 		with archinstall.arguments['profile'].load_instructions(namespace=f"{archinstall.arguments['profile'].namespace}.py") as imported:
 			if not imported._prep_function():
-				archinstall.log(
-					' * Profile\'s preparation requirements was not fulfilled.',
-					fg='red'
-				)
+				archinstall.log(' * Profile\'s preparation requirements was not fulfilled.', fg='red')
 				exit(1)
 
 	# Ask about audio server selection if one is not already set
@@ -381,13 +378,13 @@ def perform_installation(mountpoint):
 					if not imported._post_install():
 						archinstall.log(' * Profile\'s post configuration requirements was not fulfilled.', fg='red')
 						exit(1)
-						
+
 		# If the user provided custom commands to be run post-installation, execute them now.
 		if len(archinstall.arguments['custom-commands']):
-			for command in archinstall.arguments['custom-commands']:
-				archinstall.log(f'Executing custom command "{command}" ...', fg='yellow')
-				SysCommand(f"arch-chroot /mnt bash -c '{command}'")
-
+			with Boot(archinstall) as session:
+				for command in archinstall.arguments['custom-commands']:
+					archinstall.log(f'Executing custom command "{command}" ...', fg='yellow')
+					session.SysCommand(["bash", "-c"] + command.split(' '))
 
 		installation.log("For post-installation tips, see https://wiki.archlinux.org/index.php/Installation_guide#Post-installation", fg="yellow")
 		if not archinstall.arguments.get('silent'):