if b.IsCmdList {
			return nil
		}
		return errors.New("binary-only packages are no longer supported")
	}

	if p.Module != nil && !allowedVersion(p.Module.GoVersion) {
		return errors.New("module requires Go " + p.Module.GoVersion + " or later")
	}

	if err := b.checkDirectives(a); err != nil {
		return err
	}

	if err := sh.Mkdir(a.Objdir); err != nil {
		return err
	}

//	    Dir        string        // directory holding local copy of files, if any
//	    GoMod      string        // path to go.mod file describing module, if any
//	    GoVersion  string        // go version used in module
//	    Retracted  []string      // retraction information, if any (with -retracted or -u)
//	    Deprecated string        // deprecation message, if any (with -u)

// in the binary. setBuildInfo should only be called on a main package with no
// errors.
//
// This information can be retrieved using debug.ReadBuildInfo.
//
// Note that the GoVersion field is not set here to avoid encoding it twice.
// It is stored separately in the binary, mostly for historical reasons.
func (p *Package) setBuildInfo(ctx context.Context, autoVCS bool) {