BUCK

diff --git BUCK BUCK
index 2c6743f..c78029f 100644
--- BUCK
+++ BUCK
@@ -1,10 +1,22 @@
 prebuilt_jar(
   name = 'xmlbeans',
-  binary_jar = ':xmlbeans_jar',
+  binary_jar = ':xmlbeans_fixed_jar',
+)
+
+zip_file(
+  name = 'xmlbeans_fixed_jar',
+  srcs = [
+    ':xmlbeans_jar',
+  ],
 )

 remote_file(
   name = 'xmlbeans_jar',
+  # Currently, the `zip_file` step only automatically unpacks ZIP files with
+  # the `.src.zip` or `-sources.jar` extensions, so rename the download file
+  # to make this work (this could also be done with an extra `export_file`
+  # rule).
+  out = 'xmlbeans.orig-sources.jar',
   url = 'mvn:org.apache.xmlbeans:xmlbeans:jar:2.6.0',
   sha1 = '29e80d2dd51f9dcdef8f9ffaee0d4dc1c9bbfc87',
 )