Bug#1090076: rust-rebuildctl: build depends librust-rebuilderd-common-0.20.0+default-dev but it is not installable

[Adrian Bunk]

Source: rust-rebuildctl
Version: 0.20.0-1
Severity: serious
Tags: ftbfs

The following packages have unmet dependencies:
 builddeps:rust-rebuildctl : Depends: 
librust-rebuilderd-common-0.20.0+default-dev but it is not installable