Problems for source package stdx-allocator

BuildDepends

Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on mipsel. Package stdx-allocator does not exist on mipsel.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on s390x. Package stdx-allocator does not exist on s390x.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on mips64el. Package stdx-allocator does not exist on mips64el.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on ppc64el. Package stdx-allocator does not exist on ppc64el.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on i386. Package stdx-allocator does not exist on i386.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on armel. Package stdx-allocator does not exist on armel.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on armhf. Package stdx-allocator does not exist on armhf.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on arm64. Package stdx-allocator does not exist on arm64.
Package declares a build time dependency on debhelper-compat (= 12) which cannot be satisfied on amd64. Package stdx-allocator does not exist on amd64.
Package declares a build time dependency on libmir-core-dev (>= 1.0.1-2) which cannot be satisfied on mips64el. Package stdx-allocator does not exist on mips64el.
Package declares a build time dependency on libmir-core-dev (>= 1.0.1-2) which cannot be satisfied on ppc64el. Package stdx-allocator does not exist on ppc64el.
Package declares a build time dependency on libmir-core-dev (>= 1.0.1-2) which cannot be satisfied on mipsel. Package stdx-allocator does not exist on mipsel.