Bug#1031039: rust-aes-ctr build depends on librust-aes-soft-0.3+default-dev but it is not installable

[Adrian Bunk]

Source: rust-aes-ctr
Version: 0.3.0-2
Severity: serious
Tags: ftbfs

The following packages have unmet dependencies:
 builddeps:rust-aes-ctr : Depends: librust-aes-soft-0.3+default-dev but it is 
not installable