Hi,

At commit 1b321229f4653c5daa873813e24910789c0b2918 (i.e., the current
tip of the core-updates branch), ant-bootstrap@1.7.1 sometimes fails to
build.  This package is defined in gnu/packages/java.scm, but it is not
exported (i.e., it is used privately within the module).  Note that
according to 'guix refresh', currently 215 packages depend on this
package.

I tried to build this package 147 times.  It failed 5 times, and it
succeeded 142 times.  That's about a 3% failure rate.  All 5 failures
produced the same log output, which I've attached.  My machine is an
x86-64 machine.

-- 
Chris