boot

sudo nixos-rebuild -v --show-trace --install-bootloader --flake ".#kartoffel" switch
warning: Git tree '/var/src/machine-config' is dirty
building the system configuration...
warning: Git tree '/var/src/machine-config' is dirty
updating GRUB 2 menu...
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
lsblk: /dev/mapper/no*[0-9]: not a block device
lsblk: /dev/mapper/raid*[0-9]: not a block device
lsblk: /dev/mapper/disks*[0-9]: not a block device
Found Windows Boot Manager on /dev/sda1@/efi/Microsoft/Boot/bootmgfw.efi
activating the configuration...
setting up /etc...
reloading user units for pinpox...
setting up tmpfiles

/var/src/machine-config main*
▸ lsblk
NAME          MOUNTPOINT LABEL                        SIZE TYPE  UUID
sda                      CCCOMA_X64FRE_EN-GB_DV9    465.8G disk  478c00004d532055
├─sda1                                                100M part  B8AF-223C
├─sda2                                                 16M part
├─sda3                                              465.2G part  5A62B45C62B43F17
└─sda4                                                505M part  72E2304FE23019B5
sdb                                                   489G disk
├─sdb1        /boot                                   500M part  5D7C-69F9
└─sdb2                                              488.6G part  608e0e77-eea4-4dc4-b88d-76cc63e4488b
  └─root                                            488.5G crypt 2Fo0GS-9HwJ-NlFP-TRIr-tEtM-BCXq-jP2jXv
    ├─vg-swap [SWAP]     swap                           8G lvm   0f369649-cdbc-4a34-82dc-9f442c445c53
    └─vg-root /          root                       480.5G lvm   8dcfb3f0-4dba-4c32-af96-84024706ff76
sdc                      nixos-minimal-20.09-x86_64   3.7G disk  1980-01-01-00-00-00-00
├─sdc1                   nixos-minimal-20.09-x86_64   568M part  1980-01-01-00-00-00-00
└─sdc2                   EFIBOOT                       23M part  1234-5678