| 14 Mar 2026 |
 lassulus | seems like it can't find the key | 20:34:16 |
| lassulus | so probably unrelated | 20:34:20 |
 matthewcroughan | but how does this succeed in the installer test ? | 20:34:30 |
| matthewcroughan | but not in disk image building | 20:34:33 |
| matthewcroughan | is the exit code ignored in the installer test? | 20:34:40 |
| lassulus | it probably creates /tmp/secret.key? | 20:34:48 |
| matthewcroughan | ah yeah it does | 20:35:00 |
| matthewcroughan | lib/tests.nix does this for tests | 20:35:13 |
| matthewcroughan | Okay, so imageSize being set wrong, or errors in the disko config can both lead to kernel panics | 20:37:30 |
| matthewcroughan | and ofc not enough space | 20:37:51 |
| lassulus | hm errors in the config should lead to eval errors | 20:37:58 |
| matthewcroughan | so it's very easy to conflate that with other things, but I think I have an actual reproducer now | 20:38:01 |
| matthewcroughan | you do need an image of a certain size before memory becomes an issue | 20:38:17 |
| lassulus | except if they are like not catched errors :D | 20:38:17 |
| matthewcroughan | By wrong I meant too small | 20:39:08 |
| matthewcroughan | which the eval can't catch | 20:39:10 |
| matthewcroughan | lassulus: https://github.com/nix-community/disko/pull/1235 | 21:22:40 |
|  amadaluzia -> 4d2.org changed their display name from amadaluzia[uorg] to amadaluzia -> 4d2.org. | 21:23:09 |
| matthewcroughan | If it is possible to reproduce it on other FS, I couldn't figure that out after a few hours of trying | 21:26:59 |
| matthewcroughan | CI seems to fail for some reason that I don't get on my end | 21:28:57 |
| matthewcroughan | nixos-disko-images> [2026-03-14T21:25:41Z WARN virtiofsd::passthrough] Failed to open file handle for the root node: Operation not permitted (os error 1) | 21:29:09 |
| matthewcroughan | https://buildbot.thalheim.io/#/builders/10614/builds/2/steps/1/logs/stdio | 21:29:11 |
|  lektrik joined the room. | 21:30:23 |
| 15 Mar 2026 |
| matthewcroughan | lassulus: About to go to bed, but I just tried your latest attempts on https://github.com/nix-community/disko/pull/1234/commits and it doesn't fix it | 01:56:59 |
| 25 Apr 2024 |
|  David Mell (zraexy) joined the room. | 23:38:25 |
| David Mell (zraexy) changed their display name from David Mell to David Mell (zraexy). | 23:51:57 |
| 26 Apr 2024 |
 Raj | Couple of questions about NixOS live USBs:
I want to partition my 64 GB USB flash drive into two partitions (FAT32 live USB + ext4 storage), so I used the following disko config:
let
usb = "/dev/disk/by-id/usb-USB_SanDisk_3.2Gen1_0401a943ae4197a38a6f9070194e9ea2b3fb8dbb7997e05ed1b197c0e28946be4b8f000000000000000000001cf4be6800926418a955810751ab6336-0:0";
in {
disko.devices = {
disk = {
live = {
type = "disk";
device = usb;
content = {
type = "gpt";
partitions = {
ESP = {
type = "EF00";
device = "${usb}-part1";
priority = 0;
size = "8192M";
content = {
type = "filesystem";
format = "vfat";
};
};
storage = {
device = "${usb}-part2";
priority = 1;
size = "100%";
content = {
type = "filesystem";
format = "ext4";
};
};
};
};
};
};
};
}
I then copied over the files from the (minimal, non-graphical) NixOS live ISO into partition 1, hoping that the instructions on the Arch wiki would generalize to NixOS, but then my live ISO gets stuck with the following error message:
[...]
Timed out waiting for device /dev/root, trying to mount anyway
mounting /dev/root on /iso...
mount: mounting /dev/root on /mnt-root/iso failed: No such file or directory
An error occurred [...]
How can I use my USB flash drive as both a live USB and as a storage device? I found this relevant Discourse link but there was no resolution to the problem there.
I realize this might not be the best place to ask this, but I figured that folks here would have expertise configuring boot partitions correctly.
| 02:02:16 |
| Raj | * Couple of questions about NixOS live USBs:
I want to partition my 64 GB USB flash drive into two partitions (FAT32 live USB + ext4 storage), so I used the following disko config:
let
usb = "/dev/disk/by-id/usb-USB_SanDisk_3.2Gen1_0401a943ae4197a38a6f9070194e9ea2b3fb8dbb7997e05ed1b197c0e28946be4b8f000000000000000000001cf4be6800926418a955810751ab6336-0:0";
in {
disko.devices = {
disk = {
live = {
type = "disk";
device = usb;
content = {
type = "gpt";
partitions = {
ESP = {
type = "EF00";
device = "${usb}-part1";
priority = 0;
size = "8192M";
content = {
type = "filesystem";
format = "vfat";
};
};
storage = {
device = "${usb}-part2";
priority = 1;
size = "100%";
content = {
type = "filesystem";
format = "ext4";
};
};
};
};
};
};
};
}
I then copied over the files from the (minimal, non-graphical) NixOS live ISO into partition 1, hoping that the instructions on the Arch wiki would generalize to NixOS, but then my live ISO gets stuck with the following error message:
[...]
Timed out waiting for device /dev/root, trying to mount anyway
mounting /dev/root on /iso...
mount: mounting /dev/root on /mnt-root/iso failed: No such file or directory
An error occurred [...]
How can I use my USB flash drive as both a live USB and as a storage device? I found this relevant Discourse link but there was no resolution to the problem there.
I realize this might not be the best place to ask this, but I figured that folks here would have expertise configuring boot partitions correctly.
For reference, the NixOS manual says I should dd the ISO to the disk directly: sudo dd if=<path-to-image> of=/dev/sdX bs=4M conv=fsync
| 02:12:28 |
 tim | I don't think that this will work since you need to unmount the live USB to format it as storage device | 07:16:00 |
| Raj | In reply to @tim92:matrix.org
I don't think that this will work since you need to unmount the live USB to format it as storage device Not sure what you mean, exactly. To clarify, I'm not trying to format the USB while it's live; I'm running this from an existing NixOS install.
If the"live USB" bit uses only ~1 GiB, there should be some way to make use of the remaining space, hopefully. | 07:57:47 |
