Require Moo 0.091009

Build.PL

@@ -14,7 +14,7 @@ my $build = Module::Build->new(
         'Math::ConvexHull'          => '1.0.4',
         'Math::Geometry::Voronoi'   => '1.3',
         'Math::PlanePath'           => '53',
-        'Moo'                       => '0',
+        'Moo'                       => '0.091009',
         'perl'                      => '5.10.0',
         'Scalar::Util'              => '0',
         'Time::HiRes'               => '0',

lib/Slic3r.pm

@@ -24,7 +24,7 @@ BEGIN {
 use FindBin;
 our $var = "$FindBin::Bin/var";
 
-use Moo;
+use Moo 0.091009;
 use Slic3r::Config;
 use Slic3r::ExPolygon;
 use Slic3r::Extruder;