--- a/make-rules/prep-unpack.mk	Thu Sep 24 12:49:21 2015 -0700
+++ b/make-rules/prep-unpack.mk	Thu Sep 24 12:51:11 2015 -0700
@@ -54,6 +54,7 @@
 REQUIRED_PACKAGES += compress/p7zip
 REQUIRED_PACKAGES += compress/unzip
 REQUIRED_PACKAGES += compress/xz
+REQUIRED_PACKAGES += compress/zip
 REQUIRED_PACKAGES += developer/java/jdk
 REQUIRED_PACKAGES += runtime/ruby