Bug#902145: kubernetes FTBFS: cannot find package "gopkg.in/warnings.v0"

[Adrian Bunk]

Source: kubernetes
Version: 1.7.16+dfsg-1
Severity: serious
Tags: ftbfs

https://buildd.debian.org/status/package.php?p=kubernetes&suite=sid

...
src/gopkg.in/gcfg.v1/errors.go:4:2: cannot find package "gopkg.in/warnings.v0" 
in any of:
        /usr/lib/go-1.10/src/gopkg.in/warnings.v0 (from $GOROOT)
        /<<BUILDDIR>>/kubernetes-1.7.16+dfsg/_build/src/gopkg.in/warnings.v0 
(from $GOPATH)