[Pkg-libvirt-maintainers] Bug#819308: libguestfs: FTBFS in testing: Error installing linux-image-4.4.0-1-amd64

[Santiago Vila]

Package: libguestfs
Version: 1.30.6-1
Severity: serious

Dear maintainer. This package currently fails to build from source in testing:

-----------------------------------------------------------------------------
Setting up linux-image-4.4.0-1-amd64 (4.4.6-1) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-4.4.0-1-amd64
E: busybox or busybox-static, version 1:1.22.0-17~ or later, is required but not installed
update-initramfs: failed for /boot/initrd.img-4.4.0-1-amd64 with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-4.4.0-1-amd64.postinst line 525.
dpkg: error processing package linux-image-4.4.0-1-amd64 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of linux-image-amd64:
 linux-image-amd64 depends on linux-image-4.4.0-1-amd64; however:
  Package linux-image-4.4.0-1-amd64 is not configured yet.
-----------------------------------------------------------------------------    

BTW: Even if this would probably be easily fixed by adding busybox to
Build-Depends, I don't understand why a package should need an
installed Linux image to be built. Isn't this why the different
linux-headers-* packages exist?

Thanks.