Fixed windows support

Change-Id: I042ab736bb0fc6e7dce17c330b3bc663be60cc79
diff --git a/t/script/archive.t b/t/script/archive.t
index 308414a..d797c20 100644
--- a/t/script/archive.t
+++ b/t/script/archive.t
@@ -10,6 +10,7 @@
 use Test::More;
 use Test::Output qw/:stdout :stderr :functions/;
 use Data::Dumper;
+use KorAP::XML::Archive;
 use utf8;
 
 my $f = dirname(__FILE__);
@@ -21,6 +22,10 @@
   'archive'
 );
 
+unless (KorAP::XML::Archive::test_unzip) {
+  plan skip_all => 'unzip not found';
+};
+
 # Test without parameters
 stdout_like(
   sub {