Gentoo's Bugzilla –
Attachment 409748 Details for
Bug 558344app-emulation/docker 1.7.1 -> 1.8.2 with dev-lang/go-1.5 fails to build - gopath/src/github.com/docker/docker/pkg/devicemapper/devmapper_wrapper.go:191: Cdeps.device undefined (type *C.struct_dm_deps has no field or method device)