Importing YAML::XS

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

I'm importing CPAN's YAML::XS into pkgsrc and I'm not sure about naming
conventions.
The module name is YAML::XS, but DISTNAME is YAML-LibYAML-0.27.
Should PKGNAME be p5-YAML-XS-0.27 or p5-YAML-LibYAML-0.27, i.e.

#PKGNAME=       p5-${DISTNAME}

or

PKGNAME=        p5-${DISTNAME:S/LibYAML/XS/}

?