[Nix-dev] Can't create btrfs when installing nixos

[Lluís Batlle i Rossell]

On Tue, Dec 11, 2012 at 03:50:47PM +0100, Mathijs Kwik wrote:
> Hi Bill,
> 
> In an amazing coincidence, I ran into the same issue today (mkfs.btrfs
> from livecd).
> This is a bug upstream, but you can work around it by:
> 
> mkdir -p /mnt-root/nix-store.squashfs
> 
> After that, it will work.
> The issue is that that directory is mentioned in /proc/mounts but
> doesn't exist (it exists in the initrd, before switching to the real
> root). btrfs tries everything in /proc/mounts to see if you don't
> accidentally overwrite a mounted object.

Yes, I also had to use this when I created the btrfs half a year ago. I
discussed this at irc with #btrfs people, whether it's their bug... but I don't
remember the outcome.

Regards,
Lluís.

> On Tue, Dec 11, 2012 at 6:14 AM, Bill Trost <trost at cloud.rain.com> wrote:
> > Hi, all,
> >
> > I just installed nixos-minimal-0.1pre4011_13617b8-28d1785-i686-linux.iso on
> > an old ASUS netbook this weekend. I'm impressed by how smoothly it went.
> > One little hiccup, though, is that mkfs.btrfs wouldn't work -- it gave me an
> > error like "can't determine mount status of /dev/sda3".
> >
> > On a barely related front -- has anyone attempt to run an NX client under
> > NixOS? It's been a long time since I've worked with nix packages, and
> > qtnx is presumably a non-trivial package to implement.
> >
> > Thanks,
> > Bill
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