Hi, David Craven <da...@craven.ch> skribis:
> So guix doesn't work inside a vm - because /gnu/store is mounted > readonly. Right, and also because ‘guix system vm’ creates a VM that shares its store with the host system. > To be able to offload arm builds once guix system vm > --system=armhf-linux works, /gnu/store needs to be writeable. > > Can multiple daemons concurrently use the same store? No. > or alternatively, can we move the > > (unless (zero? (system* unionfs "-o" > > "cow,allow_other,use_ino,suid,dev,max_files=65536" > "/rw-root=RW:/real-root=RO" > "/root")) > (error "unionfs failed")) > > to after the 9p filesystems have been mounted, so that the unionfs > allows writing to /gnu/store too? Yes, something like that: we need to make /gnu/store a union of the host’s /gnu/store and a writable tmpfs, and we need to make sure /var/guix/db/db.sqlite is populated appropriately (images produced by ‘guix system vm-image’ do the latter.) HTH! Ludo’.
