Do you realize qv("1.5") means 1.005?

>perl -le"use version; print qv('1.5')->numify"
1.005000
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And for the numbers in the the grandparent

>perl -le"use version; print qv('v0.9')->numify"
0.009000

>perl -le"use version; print qv('v0.10')->numify"
0.010000
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The "qv" forms work fine with cpan and CPAN. You just stick to using "qv" or stick to not using "qv". Switching can require a major version change.