nixos-generate-config generates duplicate boot.initrd.luks.devices... entries which causes installation to fail

[smaximov]

Issue description

nixos-generate-config generates duplicate boot.initrd.luks.devices... entries in hardware-configuration.nix if a LUKS-encrypted Btrfs partition contains multiple subvolumes.

Steps to reproduce

1. Encrypt a partition using LUKS and create a Btrfs filesystem, as described in the manual.

2. Create two Btrfs subvolumes in the Btrfs filesystem, named root and home, and mount them as /mnt and /mnt/home, respectively.

3. Run nixos-generate-config --root /mnt and inspect /mnt/etc/nixos/hardware-configuration.nix. There should be two identical entries which set boot.initrd.luks.devices."crypted".device.

4. Run nixos-install. It should complain that boot.initrd.luks.devices."crypted".device is set multiple times and abort installation.

Workaround

Edit /mnt/etc/nixos/hardware-configuration.nix and remove duplicate entries.

Technical details

Graphical live CD, 64-bit Intel/AMD

[arianvp]

Confirmed. I'll have a look this weekend if I can fix this.

[stale]

Thank you for your contributions.

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