Problems for source package rust-crossbeam

BuildDepends

Package declares a build time dependency on debhelper (>= 11) which cannot be satisfied on ppc64el. Package rust-crossbeam does not exist on ppc64el.
Package declares a build time dependency on debhelper (>= 11) which cannot be satisfied on mips64el. Package rust-crossbeam does not exist on mips64el.
Package declares a build time dependency on debhelper (>= 11) which cannot be satisfied on mipsel. Package rust-crossbeam does not exist on mipsel.
Package declares a build time dependency on debhelper (>= 11) which cannot be satisfied on armel. Package rust-crossbeam does not exist on armel.
Package declares a build time dependency on debhelper (>= 11) which cannot be satisfied on mips. Package rust-crossbeam does not exist on mips.
Package declares a build time dependency on debhelper (>= 11) which cannot be satisfied on s390x. Package rust-crossbeam does not exist on s390x.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on mipsel. Package rust-crossbeam does not exist on mipsel.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on mips64el. Package rust-crossbeam does not exist on mips64el.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on ppc64el. Package rust-crossbeam does not exist on ppc64el.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on s390x. Package rust-crossbeam does not exist on s390x.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on mips. Package rust-crossbeam does not exist on mips.
Package declares a build time dependency on libstd-rust-dev <!nocheck> which cannot be satisfied on armel. Package rust-crossbeam does not exist on armel.
Package declares a build time dependency on dh-cargo (>= 6) which cannot be satisfied on armel. Package rust-crossbeam does not exist on armel.
Package declares a build time dependency on dh-cargo (>= 6) which cannot be satisfied on mips. Package rust-crossbeam does not exist on mips.
Package declares a build time dependency on dh-cargo (>= 6) which cannot be satisfied on s390x. Package rust-crossbeam does not exist on s390x.
Package declares a build time dependency on dh-cargo (>= 6) which cannot be satisfied on ppc64el. Package rust-crossbeam does not exist on ppc64el.
Package declares a build time dependency on dh-cargo (>= 6) which cannot be satisfied on mips64el. Package rust-crossbeam does not exist on mips64el.
Package declares a build time dependency on dh-cargo (>= 6) which cannot be satisfied on mipsel. Package rust-crossbeam does not exist on mipsel.

Malformed Build-Depends

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