# Pastebin hnjqbRqO
MacBook-Pro-de-Fernando:use fernando$ for f in META6.json A1.pm6 A2.pm6 t/test.t ; do echo -e "\n# $f"; cat $f; echo "# --------------------"; done

# META6.json
{
    "perl" : "6.*",
    "name" : "test",
    "version" : "1",
    "description" : "test",
    "authors" : [ "Fernando Corrêa de Oliveira" ],
    "provides" : {
        "A:ver<0.1>": "A1.pm6",
		"A:ver<0.2>": "A2.pm6"
    },
	"emulates": {
		"A1": "Aum",
		"A2": "Adois"
	},
    "depends" : [ ],
    "test-depends" : [
        "Test",
        "Test::META"
    ],
    "source-url" : "git@github.com:FCO/DateTime-Extended.git"
}
# --------------------

# A1.pm6
class A:ver<0.1> {
	has $.ver = 1
}
# --------------------

# A2.pm6
class A:ver<0.2> {
	has $.ver = 2
}
# --------------------

# t/test.t
use lib ".";
use A:ver<0.1>;

say A.new.ver
# --------------------
MacBook-Pro-de-Fernando:use fernando$ perl6 -I. t/test.t 
===SORRY!===
Could not find A:ver<0.1> at line 2 in:
    /Users/fernando/Tests/use
    /Users/fernando/.perl6
    /Users/fernando/.rakudobrew/moar-nom/install/share/perl6/site
    /Users/fernando/.rakudobrew/moar-nom/install/share/perl6/vendor
    /Users/fernando/.rakudobrew/moar-nom/install/share/perl6
    CompUnit::Repository::AbsolutePath<140590818637504>
    CompUnit::Repository::NQP<140590798749840>
    CompUnit::Repository::Perl5<140590798749880>