Exporting dynamic variables delayed until runtime?

gistfile1.txt

# ./Foo.pm

my sub EXPORT(*@a) {
    say "in EXPORT";
    ( '$*FOO' => ++state $ ).hash;
}

============== works as expected
$ perl6 -I. -e 'use Foo; say $*FOO; { use Foo; say $*FOO }; say $*FOO'
in EXPORT
in EXPORT
1
2
1

============== but not at compile time
$ perl6 -I. -e 'use Foo; BEGIN say $*FOO; { use Foo; BEGIN say $*FOO }; BEGIN say $*FOO'
in EXPORT
===SORRY!===
Dynamic variable $*FOO not found

============== unless we set up stuff at compile time, but then we get the wrong value
BEGIN PROCESS::<$FOO>=0; use Foo; BEGIN say $*FOO; { use Foo; BEGIN say $*FOO }; BEGIN say $*FOO'
in EXPORT
0
in EXPORT
0
0