I have strawberry installed. So I can run perl (without modules such as Tk)

I'm not sure dmake would actually be allowed

C:\perladdons>dir

Volume in drive C is OS

Volume Serial Number is 22FB-140E

Directory of C:\perladdons

03/11/2021 01:56 μμ <DIR> .

03/11/2021 01:56 μμ <DIR> ..

03/11/2021 08:55 πμ <DIR> Tk-804.036

14/02/2021 02:43 μμ 30.709.760 tk.tar

02/11/2021 11:44 πμ 7.024.993 Tk.tar.gz

(I renamed the .tar and .tar.gz files as plain Tk). Not sure if you mean running cpan . from the directory of the tarball (perladdons) on the unzipped directory, but in both cases it fails on authentication. So :

C:\perladdons\Tk-804.036>cpan .

Loading internal logger. Log::Log4perl recommended for better logging

You are visiting the local directory

'.'

without lock, take care that concurrent processes do not do likewise.

CPAN: LWP::UserAgent loaded ok (v6.52)

Fetching with LWP:

http://www.cpan.org/authors/01mailrc.txt.gz

LWP failed with code407 messageProxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )

And from the Tk directory:

C:\perladdons\Tk-804.036>cpan .

Loading internal logger. Log::Log4perl recommended for better logging

You are visiting the local directory

'.'

without lock, take care that concurrent processes do not do likewise.

CPAN: LWP::UserAgent loaded ok (v6.52)

Fetching with LWP:

http://www.cpan.org/authors/01mailrc.txt.gz

LWP failed with code407 messageProxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )

Proxy authentication needed!