classpathx-jaf does not build in koji.
To quote from
https://koji.fedoraproject.org/koji/getfile?taskID=1046849&name=build.log

1. ERROR in source/javax/activation/MimeType.java (at line 256)
	throw new MimeTypeParseException(message, token);
	      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The constructor MimeTypeParseException(String, String) is undefined
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2. ERROR in source/javax/activation/MimeType.java (at line 261)
	throw new MimeTypeParseException(message, token);
	      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The constructor MimeTypeParseException(String, String) is undefined
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2 problems (2 errors)
make: *** [classes/javax/activation/MimeType.class] Error 255