Or use ppm, since AS provides a version that way: https://code.activestate.com/ppm/dmake/

ppm install dmake

If it's an older version of perl, AS might deny access to the ppm repo (unless a fee is paid).
If access to the ppm repo is available, the OP can also install LWP::UserAgent and associated modules with:

ppm install libwww-perl
[download]

Cheers,
Rob