With manually partitioned encrypted btrfs root, "unlocking luks2 device" step fails

Start by reproducing the failure using the manually partitioned encrypted btrfs-root configuration described in the installation log, focusing on the “unlocking luks2 device” step. Compare the chosen manual_partitioning configuration with the point where unlocking fails; done means the LUKS2 device unlocks and installation proceeds for this configuration.

Which ISO version are you using?

2026.03.01

The installation log

[2026-03-26 19:35:59] - DEBUG - Hardware model detected: LENOVO 20L7002AUS; UEFI mode: True
[2026-03-26 19:35:59] - DEBUG - Processor model detected: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
[2026-03-26 19:35:59] - DEBUG - Memory statistics: 12301996 available out of 16127924 total installed
[2026-03-26 19:35:59] - DEBUG - Could not detect virtual system: ['/usr/bin/systemd-detect-virt'] exited with abnormal exit code [1]: none

[2026-03-26 19:35:59] - DEBUG - System is not running in a VM: ['/usr/bin/systemd-detect-virt'] exited with abnormal exit code [1]: none

[2026-03-26 19:35:59] - DEBUG - Virtualization detected: None; is VM: False
[2026-03-26 19:35:59] - DEBUG - Graphics devices detected: dict_keys(['Intel Corporation Kaby Lake-R GT2 [UHD Graphics 620] (rev 07)'])
[2026-03-26 19:35:59] - DEBUG - Disk states before installing:
{
    "blockdevices": [
        {
            "name": "loop0",
            "path": "/dev/loop0",
            "pkname": null,
            "log_sec": 512,
            "size": "955 MiB",
            "pttype": null,
            "ptuuid": null,
            "rota": false,
            "tran": null,
            "partn": null,
            "partuuid": null,
            "parttype": null,
            "uuid": null,
            "fstype": "squashfs",
            "fsver": "4.0",
            "fsavail": 0,
            "fsuse_percentage": "100%",
            "type": "loop",
            "mountpoint": "/run/archiso/airootfs",
            "mountpoints": [
                "/run/archiso/airootfs"
            ],
            "fsroots": [
                "/"
            ],
            "children": []
        },
        {
            "name": "sda",
            "path": "/dev/sda",
            "pkname": null,
            "log_sec": 512,
            "size": "0 MiB",
            "pttype": null,
            "ptuuid": null,
            "rota": false,
            "tran": "usb",
            "partn": null,
            "partuuid": null,
            "parttype": null,
            "uuid": null,
            "fstype": null,
            "fsver": null,
            "fsavail": null,
            "fsuse_percentage": null,
            "type": "disk",
            "mountpoint": null,
            "mountpoints": [],
            "fsroots": [],
            "children": []
        },
        {
            "name": "sdb",
            "path": "/dev/sdb",
            "pkname": null,
            "log_sec": 512,
            "size": "0 MiB",
            "pttype": null,
            "ptuuid": null,
            "rota": false,
            "tran": "usb",
            "partn": null,
            "partuuid": null,
            "parttype": null,
            "uuid": null,
            "fstype": null,
            "fsver": null,
            "fsavail": null,
            "fsuse_percentage": null,
            "type": "disk",
            "mountpoint": null,
            "mountpoints": [],
            "fsroots": [],
            "children": []
        },
        {
            "name": "sdc",
            "path": "/dev/sdc",
            "pkname": null,
            "log_sec": 512,
            "size": "0 MiB",
            "pttype": null,
            "ptuuid": null,
            "rota": false,
            "tran": "usb",
            "partn": null,
            "partuuid": null,
            "parttype": null,
            "uuid": null,
            "fstype": null,
            "fsver": null,
            "fsavail": null,
            "fsuse_percentage": null,
            "type": "disk",
            "mountpoint": null,
            "mountpoints": [],
            "fsroots": [],
            "children": []
        },
        {
            "name": "nvme0n1",
            "path": "/dev/nvme0n1",
            "pkname": null,
            "log_sec": 512,
            "size": "244198 MiB",
            "pttype": null,
            "ptuuid": null,
            "rota": false,
            "tran": "nvme",
            "partn": null,
            "partuuid": null,
            "parttype": null,
            "uuid": null,
            "fstype": null,
            "fsver": null,
            "fsavail": null,
            "fsuse_percentage": null,
            "type": "disk",
            "mountpoint": null,
            "mountpoints": [],
            "fsroots": [],
            "children": []
        }
    ]
}
[2026-03-26 19:35:59] - INFO - Fetching Arch Linux package database...
[2026-03-26 19:35:59] - INFO - Checking version...
[2026-03-26 19:36:00] - DEBUG - Failed to check for package upgrades: archinstall
[2026-03-26 19:36:00] - DEBUG - No archinstall upgrades found
[2026-03-26 19:36:00] - DEBUG - Running from ISO (Live Mode)...
[2026-03-26 19:36:28] - DEBUG - load mirrors: True
[2026-03-26 19:45:34] - DEBUG - Creating yescrypt hash with rounds 5
[2026-03-26 19:49:27] - DEBUG - Creating yescrypt hash with rounds 5
[2026-03-26 19:49:43] - DEBUG - Creating yescrypt hash with rounds 5
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/__init__.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/custom.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktop.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/minimal.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/server.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/tailored.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/xorg.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/__init__.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/awesome.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/bspwm.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/budgie.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/cinnamon.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/cosmic.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/cutefish.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/deepin.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/enlightenment.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/gnome.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/hyprland.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/i3.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/labwc.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/lxqt.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/mate.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/niri.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/plasma.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/qtile.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/river.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/sway.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/xfce4.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/desktops/xmonad.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/__init__.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/cockpit.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/docker.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/httpd.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/lighttpd.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/mariadb.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/nginx.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/postgresql.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/sshd.py
[2026-03-26 19:49:54] - DEBUG - Importing profile: /usr/lib/python3.14/site-packages/archinstall/default_profiles/servers/tomcat.py
[2026-03-26 20:00:53] - DEBUG -  -- Chosen configuration --
[2026-03-26 20:00:53] - DEBUG - {
    "app_config": {
        "audio_config": {
            "audio": "pipewire"
        },
        "bluetooth_config": {
            "enabled": true
        },
        "power_management_config": {
            "power_management": "power-profiles-daemon"
        },
        "print_service_config": {
            "enabled": true
        }
    },
    "archinstall-language": "English",
    "auth_config": {},
    "bootloader_config": {
        "bootloader": "Systemd-boot",
        "removable": false,
        "uki": true
    },
    "custom_commands": [],
    "disk_config": {
        "btrfs_options": {
            "snapshot_config": null
        },
        "config_type": "manual_partitioning",
        "device_modifications": [
            {
                "device": "/dev/nvme0n1",
                "partitions": [
                    {
                        "btrfs": [],
                        "dev_path": null,
                        "flags": [
                            "esp",
                            "boot"
                        ],
                        "fs_type": "fat32",
                        "mount_options": [],
                        "mountpoint": "/efi",
                        "obj_id": "49a31a2e-1356-433c-839d-903525e7bcba",
                        "size": {
                            "sector_size": {
                                "unit": "B",
                                "value": 512
                            },
                            "unit": "MiB",
                            "value": 512
                        },
                        "start": {
                            "sector_size": {
                                "unit": "B",
                                "value": 512
                            },
                            "unit": "MiB",
                            "value": 1
                        },
                        "status": "create",
                        "type": "primary"
                    },
                    {
                        "btrfs": [],
                        "dev_path": null,
                        "flags": [
                            "bls_boot"
                        ],
                        "fs_type": "ext4",
                        "mount_options": [],
                        "mountpoint": "/boot",
                        "obj_id": "02dd7395-2e03-49ab-9d69-916f23a72ed1",
                        "size": {
                            "sector_size": {
                                "unit": "B",
                                "value": 512
                            },
                            "unit": "GiB",
                            "value": 1
                        },
                        "start": {
                            "sector_size": {
                                "unit": "B",
                                "value": 512
                            },
                            "unit": "B",
                            "value": 537919488
                        },
                        "status": "create",
                        "type": "primary"
                    },
                    {
                        "btrfs": [
                            {
                                "mountpoint": "/",
                                "name": "root"
                            }
                        ],
                        "dev_path": null,
                        "flags": [],
                        "fs_type": "btrfs",
                        "mount_options": [
                            "compress=zstd"
                        ],
                        "mountpoint": null,
                        "obj_id": "cc01d94a-bbdf-4d6e-b09a-480512132a76",
                        "size": {
                            "sector_size": {
                                "unit": "B",
                                "value": 512
                            },
                            "unit": "B",
                            "value": 254447452160
                        },
                        "start": {
                            "sector_size": {
                                "unit": "B",
                                "value": 512
                            },
                            "unit": "B",
                            "value": 1611661312
                        },
                        "status": "create",
                        "type": "primary"
                    }
                ],
                "wipe": false
            }
        ],
        "disk_encryption": {
            "encryption_type": "luks",
            "lvm_volumes": [],
            "partitions": [
                "cc01d94a-bbdf-4d6e-b09a-480512132a76"
            ]
        }
    },
    "hostname": "thinklion",
    "kernels": [
        "linux"
    ],
    "locale_config": {
        "kb_layout": "us",
        "sys_enc": "UTF-8",
        "sys_lang": "en_US.UTF-8"
    },
    "mirror_config": {
        "custom_repositories": [],
        "custom_servers": [],
        "mirror_regions": {
            "United States": [
                "http://mirrors.rit.edu/archlinux/$repo/os/$arch",
                "https://mirrors.rit.edu/archlinux/$repo/os/$arch",
                "http://mirror.umd.edu/archlinux/$repo/os/$arch",
                "https://mirror.umd.edu/archlinux/$repo/os/$arch",
                "http://ftp.osuosl.org/pub/archlinux/$repo/os/$arch",
                "https://ftp.osuosl.org/pub/archlinux/$repo/os/$arch",
                "http://mirrors.lug.mtu.edu/archlinux/$repo/os/$arch",
                "https://mirrors.lug.mtu.edu/archlinux/$repo/os/$arch",
                "http://mirrors.xmission.com/archlinux/$repo/os/$arch",
                "http://mirrors.kernel.org/archlinux/$repo/os/$arch",
                "https://mirrors.kernel.org/archlinux/$repo/os/$arch",
                "http://mirrors.cat.pdx.edu/archlinux/$repo/os/$arch",
                "http://mirror.sfo12.us.leaseweb.net/archlinux/$repo/os/$arch",
                "http://mirror.wdc1.us.leaseweb.net/archlinux/$repo/os/$arch",
                "https://mirror.sfo12.us.leaseweb.net/archlinux/$repo/os/$arch",
                "https://mirror.wdc1.us.leaseweb.net/archlinux/$repo/os/$arch",
                "http://mirrors.gigenet.com/archlinux/$repo/os/$arch",
                "http://mirrors.liquidweb.com/archlinux/$repo/os/$arch",
                "http://mirror.metrocast.net/archlinux/$repo/os/$arch",
                "http://dfw.mirror.rackspace.com/archlinux/$repo/os/$arch",
                "http://iad.mirror.rackspace.com/archlinux/$repo/os/$arch",
                "http://ord.mirror.rackspace.com/archlinux/$repo/os/$arch",
                "https://dfw.mirror.rackspace.com/archlinux/$repo/os/$arch",
                "https://iad.mirror.rackspace.com/archlinux/$repo/os/$arch",
                "https://ord.mirror.rackspace.com/archlinux/$repo/os/$arch",
                "http://mirror.vtti.vt.edu/archlinux/$repo/os/$arch",
                "http://arch.mirror.constant.com/$repo/os/$arch",
                "https://arch.mirror.constant.com/$repo/os/$arch",
                "http://mirrors.acm.wpi.edu/archlinux/$repo/os/$arch",
                "http://mirrors.ocf.berkeley.edu/archlinux/$repo/os/$arch",
                "https://mirrors.ocf.berkeley.edu/archlinux/$repo/os/$arch",
                "http://arlm.tyzoid.com/$repo/os/$arch",
                "https://arlm.tyzoid.com/$repo/os/$arch",
                "http://mirror.math.princeton.edu/pub/archlinux/$repo/os/$arch",
                "http://us.mirrors.cicku.me/archlinux/$repo/os/$arch",
                "https://us.mirrors.cicku.me/archlinux/$repo/os/$arch",
                "http://mirror.cs.vt.edu/pub/ArchLinux/$repo/os/$arch",
                "http://mirrors.sonic.net/archlinux/$repo/os/$arch",
                "https://mirrors.sonic.net/archlinux/$repo/os/$arch",
                "http://distro.ibiblio.org/archlinux/$repo/os/$arch",
                "http://repo.miserver.it.umich.edu/archlinux/$repo/os/$arch",
                "http://mirrors.xtom.com/archlinux/$repo/os/$arch",
                "https://mirrors.xtom.com/archlinux/$repo/os/$arch",
                "http://mirror.siena.edu/archlinux/$repo/os/$arch",
                "http://repo.ialab.dsu.edu/archlinux/$repo/os/$arch",
                "https://repo.ialab.dsu.edu/archlinux/$repo/os/$arch",
                "http://iad.mirrors.misaka.one/archlinux/$repo/os/$arch",
                "https://iad.mirrors.misaka.one/archlinux/$repo/os/$arch",
                "http://mirror.pit.teraswitch.com/archlinux/$repo/os/$arch",
                "https://mirror.pit.teraswitch.com/archlinux/$repo/os/$arch",
                "http://mirror.arizona.edu/archlinux/$repo/os/$arch",
                "https://mirror.arizona.edu/archlinux/$repo/os/$arch",
                "http://archmirror1.octyl.net/$repo/os/$arch",
                "https://archmirror1.octyl.net/$repo/os/$arch",
                "http://plug-mirror.rcac.purdue.edu/archlinux/$repo/os/$arch",
                "https://plug-mirror.rcac.purdue.edu/archlinux/$repo/os/$arch",
                "http://mirrors.mit.edu/archlinux/$repo/os/$arch",
                "https://mirrors.mit.edu/archlinux/$repo/os/$arch",
                "http://arch.hu.fo/archlinux/$repo/os/$arch",
                "https://arch.hu.fo/archlinux/$repo/os/$arch",
                "https://zxcvfdsa.com/arch/$repo/os/$arch",
                "https://mirror.theash.xyz/arch/$repo/os/$arch",
                "http://mirror.clarkson.edu/archlinux/$repo/os/$arch",
                "https://mirror.clarkson.edu/archlinux/$repo/os/$arch",
                "http://mirrors.bloomu.edu/archlinux/$repo/os/$arch",
                "https://mirrors.bloomu.edu/archlinux/$repo/os/$arch",
                "http://codingflyboy.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://coresite.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://forksystems.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://irltoolkit.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://mirror.fcix.net/archlinux/$repo/os/$arch",
                "http://nnenix.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://nocix.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://ohioix.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://opencolo.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://southfront.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://volico.mm.fcix.net/archlinux/$repo/os/$arch",
                "http://ziply.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://codingflyboy.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://coresite.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://forksystems.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://irltoolkit.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://mirror.fcix.net/archlinux/$repo/os/$arch",
                "https://nnenix.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://nocix.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://ohioix.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://opencolo.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://southfront.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://volico.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://ziply.mm.fcix.net/archlinux/$repo/os/$arch",
                "https://losangeles.mirror.pkgbuild.com/$repo/os/$arch",
                "http://mirrors.vectair.net/archlinux/$repo/os/$arch",
                "https://mirrors.vectair.net/archlinux/$repo/os/$arch",
                "https://arch.mirror.k0.ae/$repo/os/$arch",
                "https://mirror.zackmyers.io/archlinux/$repo/os/$arch",
                "http://wcbmedia.io:8000/$repo/os/$arch",
                "https://m.lqy.me/arch/$repo/os/$arch",
                "http://mirror.adectra.com/archlinux/$repo/os/$arch",
                "https://mirror.adectra.com/archlinux/$repo/os/$arch",
                "https://arch.goober.cloud/$repo/os/$arch",
                "https://mirror.pilotfiber.com/archlinux/$repo/os/$arch",
                "http://mirrors.iu13.net/archlinux/$repo/os/$arch",
                "https://mirrors.iu13.net/archlinux/$repo/os/$arch",
                "http://mirror.colonelhosting.com/archlinux/$repo/os/$arch",
                "https://mirror.colonelhosting.com/archlinux/$repo/os/$arch",
                "https://us.arch.niranjan.co/$repo/os/$arch",
                "https://arch.mirror.marcusspencer.us:4443/archlinux/$repo/os/$arch",
                "https://us-mnz.soulharsh007.dev/archlinux/$repo/os/$arch",
                "https://mirror.akane.network/archmirror/$repo/os/$arch",
                "http://mirror.us.cdn-perfprod.com/archlinux/$repo/os/$arch",
                "https://mirror.us.cdn-perfprod.com/archlinux/$repo/os/$arch",
                "http://arch.miningtcup.me/$repo/os/$arch",
                "https://arch.miningtcup.me/$repo/os/$arch",
                "https://arch-mirror.brightlight.today/$repo/os/$arch",
                "https://mirrors.lahansons.com/archlinux/$repo/os/$arch",
                "https://mirror.givebytes.net/archlinux/$repo/os/$arch",
                "https://mirror2.givebytes.net/archlinux/$repo/os/$arch",
                "https://mirrors.shr.cx/arch/$repo/os/$arch",
                "http://mirror.mra.sh/archlinux/$repo/os/$arch",
                "https://mirror.mra.sh/archlinux/$repo/os/$arch",
                "http://repo.customcomputercare.com/archlinux/$repo/os/$arch",
                "https://repo.customcomputercare.com/archlinux/$repo/os/$arch",
                "http://arch.hugeblank.dev/$repo/os/$arch",
                "https://arch.hugeblank.dev/$repo/os/$arch",
                "https://mirrors.logal.dev/archlinux/$repo/os/$arch"
            ],
            "Worldwide": [
                "http://mirror.rackspace.com/archlinux/$repo/os/$arch",
                "https://mirror.rackspace.com/archlinux/$repo/os/$arch",
                "https://ftpmirror.infania.net/mirror/archlinux/$repo/os/$arch",
                "https://geo.mirror.pkgbuild.com/$repo/os/$arch",
                "https://fastly.mirror.pkgbuild.com/$repo/os/$arch"
            ]
        },
        "optional_repositories": [
            "multilib"
        ]
    },
    "network_config": {
        "type": "nm"
    },
    "ntp": true,
    "packages": [],
    "parallel_downloads": 0,
    "profile_config": {
        "gfx_driver": "Intel (open-source)",
        "greeter": "sddm",
        "profile": {
            "custom_settings": {
                "KDE Plasma": {}
            },
            "details": [
                "KDE Plasma"
            ],
            "main": "Desktop"
        }
    },
    "script": null,
    "services": [],
    "swap": {
        "algorithm": "zstd",
        "enabled": true
    },
    "timezone": "America/Los_Angeles",
    "version": "3.0.15"
}
[2026-03-26 20:00:59] - DEBUG - Unmounting all existing partitions: /dev/nvme0n1
[2026-03-26 20:00:59] - INFO - Use existing device: /dev/nvme0n1
[2026-03-26 20:00:59] - INFO - Creating partitions: /dev/nvme0n1
[2026-03-26 20:00:59] - DEBUG - 	Type: primary
[2026-03-26 20:00:59] - DEBUG - 	Filesystem: fat32
[2026-03-26 20:00:59] - DEBUG - 	Geometry: 2048 start sector, 1048576 length
[2026-03-26 20:00:59] - DEBUG - 	Type: primary
[2026-03-26 20:00:59] - DEBUG - 	Filesystem: ext4
[2026-03-26 20:00:59] - DEBUG - 	Geometry: 1050624 start sector, 2097152 length
[2026-03-26 20:00:59] - DEBUG - 	Type: primary
[2026-03-26 20:00:59] - DEBUG - 	Filesystem: btrfs
[2026-03-26 20:00:59] - DEBUG - 	Geometry: 3147776 start sector, 496967680 length
[2026-03-26 20:00:59] - DEBUG - Wiping signatures from: /dev/nvme0n1p1
[2026-03-26 20:00:59] - DEBUG - Wiping signatures from: /dev/nvme0n1p2
[2026-03-26 20:00:59] - DEBUG - Wiping signatures from: /dev/nvme0n1p3
[2026-03-26 20:00:59] - DEBUG - Formatting filesystem: mkfs.fat -F 32 /dev/nvme0n1p1
[2026-03-26 20:01:00] - DEBUG - partition information found: {"name":"nvme0n1p1","path":"/dev/nvme0n1p1","pkname":"nvme0n1","log_sec":512,"size":"512 MiB","pttype":"gpt","ptuuid":"af8fc713-2a27-4d4d-9351-a6fa5ac50cbb","rota":false,"tran":"nvme","partn":1,"partuuid":"f02fba50-2435-4210-a712-d21bffceecb5","parttype":"c12a7328-f81f-11d2-ba4b-00a0c93ec93b","uuid":"07BE-CBE6","fstype":"vfat","fsver":"FAT32","fsavail":null,"fsuse_percentage":null,"type":"part","mountpoint":null,"mountpoints":[],"fsroots":[],"children":[]}
[2026-03-26 20:01:00] - DEBUG - Formatting filesystem: mkfs.ext4 -F /dev/nvme0n1p2
[2026-03-26 20:01:00] - DEBUG - partition information found: {"name":"nvme0n1p2","path":"/dev/nvme0n1p2","pkname":"nvme0n1","log_sec":512,"size":"1024 MiB","pttype":"gpt","ptuuid":"af8fc713-2a27-4d4d-9351-a6fa5ac50cbb","rota":false,"tran":"nvme","partn":2,"partuuid":"78816f9b-f40f-42da-8542-646fb69a776a","parttype":"bc13c2ff-59e6-4262-a352-b275fd6f7172","uuid":"764a3301-3243-4767-893e-be5034006bce","fstype":"ext4","fsver":"1.0","fsavail":null,"fsuse_percentage":null,"type":"part","mountpoint":null,"mountpoints":[],"fsroots":[],"children":[]}
[2026-03-26 20:01:00] - DEBUG - Luks2 encrypting: /dev/nvme0n1p3
[2026-03-26 20:01:00] - DEBUG - cryptsetup format: cryptsetup --batch-mode --verbose --type luks2 --pbkdf argon2id --hash sha512 --key-size 512 --iter-time 10000 --use-urandom luksFormat /dev/nvme0n1p3
[2026-03-26 20:01:30] - DEBUG - cryptsetup luksFormat output: Key slot 0 created.
Command successful.
[2026-03-26 20:01:30] - DEBUG - Unlocking luks2 device: /dev/nvme0n1p3
[2026-03-26 20:01:41] - ERROR - Traceback (most recent call last):
  File "/usr/lib/python3.14/site-packages/archinstall/__init__.py", line 134, in run_as_a_module
    rc = main()
  File "/usr/lib/python3.14/site-packages/archinstall/__init__.py", line 124, in main
    importlib.import_module(mod_name)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/usr/lib/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1342, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 938, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 759, in exec_module
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "/usr/lib/python3.14/site-packages/archinstall/scripts/guided.py", line 216, in <module>
    guided()
    ~~~~~~^^
  File "/usr/lib/python3.14/site-packages/archinstall/scripts/guided.py", line 211, in guided
    fs_handler.perform_filesystem_operations()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.14/site-packages/archinstall/lib/disk/filesystem.py", line 70, in perform_filesystem_operations
    self._format_partitions(mod.partitions)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/archinstall/lib/disk/filesystem.py", line 93, in _format_partitions
    device_handler.format_encrypted(
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
    	part_mod.safe_dev_path,
     ^^^^^^^^^^^^^^^^^^^^^^^
    ...<2 lines>...
    	self._enc_config,
     ^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/lib/python3.14/site-packages/archinstall/lib/disk/device_handler.py", line 358, in format_encrypted
    luks_handler.unlock(key_file=key_file)
    ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/archinstall/lib/luks.py", line 158, in unlock
    result = run(cmd, input_data=passphrase)
  File "/usr/lib/python3.14/site-packages/archinstall/lib/general.py", line 459, in run
    return subprocess.run(
           ~~~~~~~~~~~~~~^
    	cmd,
     ^^^^
    ...<3 lines>...
    	check=True,
     ^^^^^^^^^^^
    )
    ^
  File "/usr/lib/python3.14/subprocess.py", line 577, in run
    raise CalledProcessError(retcode, process.args,
                             output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['cryptsetup', 'open', '/dev/nvme0n1p3', 'root', '--type', 'luks2']' returned non-zero exit status 5.

[2026-03-26 20:01:41] - WARNING - Archinstall experienced the above error. If you think this is a bug, please report it to
https://github.com/archlinux/archinstall and include the log file "/var/log/archinstall/install.log".

Hint: To extract the log from a live ISO 
curl -F 'file=@/var/log/archinstall/install.log' https://0x0.st

describe the problem

With manually partitioned encrypted btrfs root, "unlocking luks2 device" step fails.

Specifically:
cryptsetup open /dev/nvme0n1p3 root --type luks2

fails with return code 6.

The error log does not include the stderr of cryptsetup, but if I run the same command again manually afterwards, I get:

(Hand-copied because it's in a tty)

device-mapper: table: 253:0 crypt: unknown table type
device-mapper: ioctl: error adding target to table
device-mapper: reload ioctl on root (253:0) failed: Invalid argument

archinstall was updated with pacman before starting.

Notably, if you choose "best effort default partitioning layout", even with an encrypted btrfs root, it does not fail.