Actually, if you want to export later (and not just return the value). Just add your variable as a package variable, and export it in @EXPORT_OK. Then you can either write: use MyModule2 '$ourscalar', or if you want to export it later:

use MyModule2; #only exports defaults
... #some code
MyModule2->import('$ourscalar');
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use actually calls import right after require, except it is down at compile time rather than during execution.