jimk

<   'make_install_make_command' => q[/usr/bin/make],
---
>   'make_install_make_command' => [ q[sudo], q[/usr/bin/make] ],
[download]

These were the results observed while trying to install a pure Perl distribution from CPAN:

And so it wasn't installed. When I restored MyConfig.pm to the version that came with 1.83, then temporarily hid the ~/.gnupg directory, then called sudo cpan, the module installed properly, with only the following warning message:

WARNING: This key is not certified with a trusted signature!
Primary key fingerprint: [a key which I think is the module author's]
Signature for /Users/jimk/.cpan/sources/authors/id/D/DA/DAGOLDEN/CHECK
+SUMS ok
Fetching with LWP:
  http://www.cpan.org/authors/id/D/DA/DAGOLDEN/CHECKSUMS
WARNING: This key is not certified with a trusted signature!
Primary key fingerprint: [a key which I think is the module author's]
[download]

jimk

Running make for D/DA/DAGOLDEN/File-Marker-0.10.tar.gz. Warning: You are not allowed to write into directory "/Users/jimk/.cpan/sources/authors/id/D/DA/DAGOLDEN". I'll continue, but if you encounter problems, they may be due to insufficient permissions.

I imagine this, and similar, warnings/errors are due to the fact that the relevant directories were originally created by root, and now you're running things as jimk. Try changing the ownership of everything under /Users/jimk/.cpan/ to jimk (and also adjust the group, if relevant).