>perl -we "use Module"
ok

>perl -we "require Module if $^O =~ /Win/"
Too late to run INIT block at Module.pm line 3.

>perl -we "eval 'use Module' if $^O =~ /Win/"
Too late to run INIT block at Module.pm line 3.

>perl -we "BEGIN { eval 'use Module' if $^O =~ /Win/ }"
ok