I have a USB stick and an NTFS hard drive partition that I'd want to use in NixOS. On some other distribution, I'd mount it using ntfs-3g in /mnt. But on NixOS, the directory doesn't exist; I suppose NixOS has some other canonical way and/or place of doing that.
In NixOS, how should one set up automounting of external partitions, preferably using configuration.nix?
Well, I costumarily use bashmount or udisksctl to mount USB sticks. They will be mounted in /run/media/$(user name)/$(drive label or UUID).
But if you are talking about an internal harddisk or partition in a local harddrive, the simplest way is:
$
mount /dev/sdn5 /mnt/windows-partition
nixos-rebuild switch!/mnt directory, the answer seems to be "make your own or mount it wherever you like". /dev/sda whenever I boot the system. This is messing with NixOS, because it isn't the boot disk. The generated hardware config file refers to the disk as device = "/dev/disk/by-uuid/<UUID>";. How do I change the configuration file to make sure my boot disk is /dev/sda? /dev/sd*. If I am understanding it correctly, you need to work with udev rules in order to make those symlinks. I can't help here, however. discourse.nixos.org/t/… I personally use udisks for that. That means, if i want to mount an USB stick, i just have to plug it in and run:
$ udisksctl mount -b /dev/sdc I aliased udisksctl mount -b to udm to make it even shorter. The device is then mounted in /run/media/$USER/$DEVICE_LABEL and accessible for you.
I think, some tools (e.g. nautilus and ldm) can do that automatically for you.
EDIT: ah, i just found out that udisks can also automount devices.
udiskie see also USB storage devices - NixOS Wiki hardware-configuration.nix fileTo achieve the same results as mentioned in other answers, you can as well add another fileSystems config entry in hardware-configuration.nix:
{ ... fileSystems."${mount_location}" = { device = "/dev/${device}"; fsType = "${filesystem_extension}"; }; ... } To get filesystem extension information about a particular partition run:
df -T | grep /dev/${device} Example configuration for /dev/sda1 device, having ext4 file system extension, that is to be mounted at /mnt/sda1 location:
{ ... fileSystems."/mnt/sda1" = { device = "/dev/sda1"; fsType = "ext4"; }; ... } I think that such a solution is more unique, as the device name would not be overwritten by NixOS specific namespaces as in nixos-generate-config's solution.
I'd mount it using
ntfs-3gin/mnt
by default, udisks mounts filesystems at /run/media/$USER/$filesystem_name
and /run/media/$USER has mode 0700, so its readable only by $USER
to make the mountpoints readable by all users:
# /etc/nixos/configuration.nix # https://discourse.nixos.org/t/how-to-create-files-in-the-etc-udev-rules-d-directory/11929/11 services.udev.packages = [ # mount drives at /media/$filesystem_name with access for all users # /run/media/$USER has mode 0700 # https://unix.stackexchange.com/questions/473174/configure-udisks-permission (pkgs.writeTextFile { name = "udisks2-rules-share-mounts"; text = '' # UDISKS_FILESYSTEM_SHARED # ==1: mount filesystem to a shared directory (/media/$filesystem_name) # ==0: mount filesystem to a private directory (/run/media/$USER/$filesystem_name) # see also: man udisks ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{UDISKS_FILESYSTEM_SHARED}="1" ''; destination = "/etc/udev/rules.d/99-udisks2.rules"; }) ]; # https://unix.stackexchange.com/questions/710842/nixos-ensure-root-level-folder-exists systemd.tmpfiles.rules = [ # create /media directory for udisks2-rules-share-mounts "d /media 0755 root root 99999y" ]; 
nautilusif you haveservices.xserver.desktopManager.gnome3.enable = true;in yourconfiguration.nixand you'll see the drive and it'll get mounted at/run/media/$USER/<drive name>