Invalid configuration: root partition not found” with encrypted root, even when root is correctly mounted

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
45/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Active
Tech stack
linux, python

Research direction

No source file or test is named in the report. Start by reproducing the pre-mounted configuration with an encrypted root, verifying the root mount at /mnt and EFI mount at /mnt/booti, then trace the validation entry point that reports the missing root. Done means archinstall recognizes the mounted root and proceeds without the invalid-configuration error.

Written by the indexing model from the issue text.

Description

Which ISO version are you using?

https://fastly.mirror.pkgbuild.com/iso/2026.01.01/archlinux-x86_64.iso

The installation log
ryzen 7 9700x
nvidia RTX4060
nvme
describe the problem

While installing Arch Linux using archinstall with an encrypted (LUKS) root partition(pre- mounted configuration), the installer showing the error:

"Invalid configuration: root partition not found"

This happens even though the root partition is correctly opened, formatted, and mounted at /mnt, and the EFI partition is mounted at /mnt/booti.

Manual verification confirms that the root filesystem is present and accessible, but archinstall fails to detect it.

Please let me know if there is any solution to this problem. I am unable to use my PC due to this.🫪

Dominant language
Python
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Merged PRs (30d)
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