Problems for source package rust-vhost-user-backend

BuildDepends

Package declares a build time dependency on librust-virtio-bindings-0.2+default-dev (>= 0.2.1-~~) <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on librust-virtio-bindings-0.2+default-dev (>= 0.2.1-~~) <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-virtio-bindings-0.2+default-dev (>= 0.2.1-~~) <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vhost-0.13+default-dev <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on librust-vhost-0.13+default-dev <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vhost-0.13+default-dev <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-virtio-queue-0.14+default-dev <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on librust-virtio-queue-0.14+default-dev <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-virtio-queue-0.14+default-dev <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vm-memory-0.16+backend-atomic-dev <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vm-memory-0.16+backend-atomic-dev <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-vm-memory-0.16+backend-atomic-dev <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on librust-vm-memory-0.16+backend-bitmap-dev <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on librust-vm-memory-0.16+backend-bitmap-dev <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-vm-memory-0.16+backend-bitmap-dev <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vm-memory-0.16+default-dev <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on librust-vm-memory-0.16+default-dev <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-vm-memory-0.16+default-dev <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on architecture-is-64-bit which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on architecture-is-64-bit which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on architecture-is-64-bit which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vhost-0.13+vhost-user-backend-dev <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vhost-0.13+vhost-user-backend-dev <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-vhost-0.13+vhost-user-backend-dev <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.
Package declares a build time dependency on librust-vm-memory-0.16+backend-mmap-dev <!nocheck> which cannot be satisfied on i386. Package rust-vhost-user-backend does not exist on i386.
Package declares a build time dependency on librust-vm-memory-0.16+backend-mmap-dev <!nocheck> which cannot be satisfied on armel. Package rust-vhost-user-backend does not exist on armel.
Package declares a build time dependency on librust-vm-memory-0.16+backend-mmap-dev <!nocheck> which cannot be satisfied on armhf. Package rust-vhost-user-backend does not exist on armhf.

Malformed Build-Depends

Package declares a build time dependency on 'cargo:native <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'rustc:native <!nocheck>' which is broken Syntax.