As others have, suggested, require is the answer. However, in order to get the full functionality of use, you should call import on the package you just required.

BEGIN {
   @mods = glob("/home/cuberat/mods/*");
   for (@mods) { require $_;  $_->import; }
}
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Also, I'm not sure if this is intentional, but globbing those files leaves the .pm on, which may not be what you want. Try adding

s{.pm}{};
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to your for loop before the require.