Problems for source package rust-base64-url

BuildDepends

Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on mips64el. Package rust-base64-url does not exist on mips64el.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on armel. Package rust-base64-url does not exist on armel.
Package declares a build time dependency on librust-base64-0+std-dev <!nocheck> which cannot be satisfied on armel. Package rust-base64-url does not exist on armel.
Package declares a build time dependency on librust-base64-0+std-dev <!nocheck> which cannot be satisfied on mips64el. Package rust-base64-url does not exist on mips64el.
Package declares a build time dependency on dh-sequence-cargo which cannot be satisfied on mips64el. Package rust-base64-url does not exist on mips64el.
Package declares a build time dependency on dh-sequence-cargo which cannot be satisfied on armel. Package rust-base64-url does not exist on armel.
Package declares a build time dependency on librust-base64-0+alloc-dev <!nocheck> which cannot be satisfied on mips64el. Package rust-base64-url does not exist on mips64el.
Package declares a build time dependency on librust-base64-0+alloc-dev <!nocheck> which cannot be satisfied on armel. Package rust-base64-url does not exist on armel.
Package declares a build time dependency on debhelper-compat (= 13) which cannot be satisfied on armel. Package rust-base64-url does not exist on armel.
Package declares a build time dependency on debhelper-compat (= 13) which cannot be satisfied on mips64el. Package rust-base64-url does not exist on mips64el.

Malformed Build-Depends

Package declares a build time dependency on 'rustc:native (>= 1.57) <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'cargo:native <!nocheck>' which is broken Syntax.