This has been broken nearly all the time due to the patches needed to
iproute2 not being compatible with the newer versions we have been
shipping. As long as Ubuntu does not manage to upstream these changes
so they are maintained with iproute2 and we don't have a maintainer
updating these patches to new iproute2 versions it is not feasible to
have this available.
This includes fuse-common (fusePackages.fuse_3.common) as recommended by
upstream. But while fuse(2) and fuse3 would normally depend on
fuse-common we can't do that in nixpkgs while fuse-common is just
another output from the fuse3 multiple-output derivation (i.e. this
would result in a circular dependency). To avoid building fuse3 twice I
decided it would be best to copy the shared files (i.e. the ones
provided by fuse(2) and fuse3) from fuse-common to fuse (version 2) and
avoid collision warnings by defining priorities. Now it should be
possible to install an arbitrary combination of "fuse", "fuse3", and
"fuse-common" without getting any collision warnings. The end result
should be the same and all changes should be backwards compatible
(assuming that mount.fuse from fuse3 is backwards compatible as stated
by upstream [0] - if not this might break some /etc/fstab definitions
but that should be very unlikely).
My tests with sshfs (version 2 and 3) didn't show any problems.
See #28409 for some additional information.
[0]: https://github.com/libfuse/libfuse/releases/tag/fuse-3.0.0
Currently the `rpc-gssd.service` has a `ConditionPathExists` clause that can
never be met, because it's looking for stateful data inside `/nix/store`.
`auth-rpcgss-module.service` also only starts if this file exists.
FixesNixOS/nixpkgs#29509.
