On 2019-07-14 11:56 -0400, Theodore Ts'o wrote:
> So this is weird. I can't install libfuse3-dev on my buster system:
>
> # apt install libfuse3-dev
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> Package libfuse3-dev is not available, but is referred to by another package.
> This may mean that the package is missing, has been obsoleted, or
> is only available from another source
>
> E: Package 'libfuse3-dev' has no installation candidate
>
> Apt seems to think it is a virtual package:
>
> # apt show libfuse3-dev
> Package: libfuse3-dev
> State: not a real package (virtual)
> N: Can't select candidate version from package libfuse3-dev as it has no
> candidate
> N: There is 1 additional record. Please use the '-a' switch to see it
> N: No packages found
> # apt show -a libfuse3-dev
> Package: libfuse3-dev
> Version: 3.4.1-1
> Priority: optional
> Section: libdevel
> Source: fuse3
> Maintainer: Laszlo Boszormenyi (GCS) <g...@debian.org>
> Installed-Size: 668 kB
> Depends: libfuse3-3 (= 3.4.1-1), libselinux-dev
> Suggests: fuse
> Homepage: https://github.com/libfuse/libfuse/wiki
> Tag: devel::library, role::devel-lib
> Download-Size: 128 kB
> APT-Sources: https://mirrors.kernel.org/debian buster/main amd64 Packages
> Description: Filesystem in Userspace (development) (3.x version)
> Filesystem in Userspace (FUSE) is a simple interface for userspace programs
> to
> export a virtual filesystem to the Linux kernel. It also aims to provide a
> secure method for non privileged users to create and mount their own
> filesystem
> implementations.
> .
> This package contains the development files.
>
> But as near as I can tell, it's a real package:
>
> https://packages.debian.org/buster/libfuse3-dev
This can happen if you have assigned a negative Pin-Priority to
libfuse3-dev. According to apt_preferences(5), a Priority < 0 "prevents
the version from being installed", and apparently apt achieves this by
pretending that the package is not there at all.
Cheers,
Sven
