Your original code seems to work as long as the scalar $globalVar is exported using its correct name, i.e., using the $ sigil.
c:\@Work\Perl\monks>perl -wMstrict -le
"MyPackage->import;
print $::globalVar;
$::globalVar=1;
print $::globalVar;
myfunction();
BEGIN{
package MyPackage;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw($globalVar myfunction);
our $globalVar = 42;
sub myfunction { print 'hi from ', __PACKAGE__; }
}
"
42
1
hi from MyPackage
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