Install fails with golang 1.6

[milgner]

$ go version
go version go1.6 linux/amd64

$ go get github.com/jingweno/nut
package github.com/jingweno/nut
    imports github.com/jingweno/nut/vendor/_nuts/github.com/BurntSushi/toml: must be imported as _nuts/github.com/BurntSushi/toml
package github.com/jingweno/nut
    imports github.com/jingweno/nut/vendor/_nuts/github.com/codegangsta/cli: must be imported as _nuts/github.com/codegangsta/cli
package github.com/jingweno/nut
    imports github.com/jingweno/nut/vendor/_nuts/golang.org/x/tools/go/vcs: must be imported as _nuts/golang.org/x/tools/go/vcs

[caikaijie]

export GO15VENDOREXPERIMENT=0

see: https://golang.org/doc/go1.6#go_command