perl - CPAN でパッケージをインストール/アップグレードできない

Question

CPAN でいくつかのモジュールをインストールしようとしましたが、すべてのモジュールで次のエラーが発生します。

CPAN installation problem " Package contains both files[bignum-0.30.tar] and directories[bignum-0.30]; not recognized as a perl package, giving up, won't make".
Untarred RRD-Simple-1.44.tar successfully
Package contains both files[RRD-Simple-1.44.tar] and directories[RRD-Simple-1.44]; not recognized as a perl package, giving up
  Package contains both files[RRD-Simple-1.44.tar] and directories[RRD-Simple-1.44]; not recognized as a perl package, giving up, won't make
Running Untarred RRD-Simple-1.44.tar successfully
Package contains both files[RRD-Simple-1.44.tar] and directories[RRD-Simple-1.44]; not recognized as a perl package, giving up
  Package contains both files[RRD-Simple-1.44.tar] and directories[RRD-Simple-1.44]; not recognized as a perl package, giving up, won't make
Running make test
  Make had some problems, won't test.

数日前は機能していましたが。どんな助けでも大歓迎です。