Build error: ../../vendor/github.com/viant/afs/embed/manager.go:5:2: cannot find package "embed" in any of

I am getting this build error:

../../vendor/github.com/viant/afs/embed/manager.go:5:2: cannot find package "embed" in any of:
        /home/Murph/go/src/github.com/bluearchive/main/vendor/embed (vendor tree)
        /usr/local/go/src/embed (from $GOROOT)
        /home/Murph/go/src/embed (from $GOPATH)

I am not trying to use the embed package, but it appears that what I am trying to use requires it. Here are my imports:

        "github.com/viant/afs"
        "github.com/viant/afs/scp"
        "github.com/viant/afs/option"

And here is all the code I have written to sfar:

auth := scp.NewAuthProvider (nil, option.NewBasicAuth ("user", "password"))
service := afs.New()

I ran dep ensure, which put the packages into my vendor/github.com/viant/afs directory. It also put the embed package there.

The start of afs/embed/manager.go looks like this:

package embed

import (
        "context"
        "embed"

This package appears to be trying to import itself, which I have never seen.

My Go version is 1.12.17.

Any ideas why this isn't working?

Thanks.

viant / afs

Build error: ../../vendor/github.com/viant/afs/embed/manager.go:5:2: cannot find package "embed" in any of #9