I would consider it a bug, but I don't see the point in specifying dist names if you're not asking for specific versions, ie 
GBARR/Scalar-List-Utils-1.21.tar.gz

[download]
If you don't care what version, just use module names 
Scalar::Util

[download]

In reply to Re: CPANPLUS won't install distros by name (e.g. Scalar-List-Utils) by Anonymous Monk
in thread CPANPLUS won't install distros by name (e.g. Scalar-List-Utils) by wu-lee

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