Problems for source package rust-num-bigint

BuildDepends

Package declares a build time dependency on debhelper (>= 12) which cannot be satisfied on mips64el. Package rust-num-bigint does not exist on mips64el.
Package declares a build time dependency on librust-num-integer-0.1+i128-dev (>= 0.1.46-~~) <!nocheck> which cannot be satisfied on mips64el. Package rust-num-bigint does not exist on mips64el.
Package declares a build time dependency on librust-num-traits-0.2+std-dev (>= 0.2.18-~~) <!nocheck> which cannot be satisfied on mips64el. Package rust-num-bigint does not exist on mips64el.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on mips64el. Package rust-num-bigint does not exist on mips64el.
Package declares a build time dependency on librust-num-integer-0.1+std-dev (>= 0.1.46-~~) <!nocheck> which cannot be satisfied on mips64el. Package rust-num-bigint does not exist on mips64el.
Package declares a build time dependency on librust-num-traits-0.2+i128-dev (>= 0.2.18-~~) <!nocheck> which cannot be satisfied on mips64el. Package rust-num-bigint does not exist on mips64el.
Package declares a build time dependency on dh-cargo (>= 25) which cannot be satisfied on mips64el. Package rust-num-bigint does not exist on mips64el.

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 (>= 1.60) <!nocheck>' which is broken Syntax.