const go/build.FindOnly

3 uses

	go/build (current package)
		build.go#L368: 	FindOnly ImportMode = 1 << iota
		build.go#L795: 	if mode&FindOnly != 0 {

	golang.org/x/tools/internal/gcimporter
		gcimporter.go#L98: 		bp, _ := build.Import(path, srcDir, build.FindOnly|build.AllowBinary)