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 Help? - Ted