Hi,

At commit 464a29d3d74e7d2f27042db6ab166bfdbe1f992e ('git branch --all
--contains 464a29d3d74e7d2f27042db6ab166bfdbe1f992e' tells me that only
core-updates has this commit at this time), the following error occurs
when trying to build ant-bootstrap, which causes the 409 dependent
packages to fail, also:

--8<---------------cut here---------------start------------->8---
$ guix build -e '(@@ (gnu packages java) ant-bootstrap)'
...
Issued 1 semantic warning compiling "src/main/org/apache/tools/ant/filters/FixCrLfFilter.java":

                        <---------
   665.                 case '\r':
   . . .
   684.                     }
        -------------------->
*** Semantic Warning: This switch block can fall through to the next case. Did you forget a break statement?

Issued 1 semantic warning compiling "src/main/org/apache/tools/ant/taskdefs/Zip.java":

  1555.             Vector resources = new Vector();
                           ^-------^
*** Semantic Warning: Local "resources" shadows a field of the same name in "org.apache.tools.ant.taskdefs.Zip".

Issued 1 semantic warning compiling "src/main/org/apache/tools/ant/taskdefs/Get.java":

   633.             URLConnection connection = aSource.openConnection();
                                  ^--------^
*** Semantic Warning: Local "connection" shadows a field of the same name in "org.apache.tools.ant.taskdefs.Get$GetThread".

Issued 1 semantic warning compiling "src/main/org/apache/tools/ant/taskdefs/rmic/XNewRmic.java":

    34.     public static final String COMPILER_NAME = "xnew";
                                       ^-----------^
*** Semantic Warning: Field "COMPILER_NAME" shadows a field of the same name in "org.apache.tools.ant.taskdefs.rmic.ForkingSunRmic".
... Copying Required Files
... Building Ant Distribution
Buildfile: /tmp/guix-build-ant-bootstrap-1.8.4.drv-0/apache-ant-1.8.4/build.xml

BUILD FAILED
Could not load the version information.

Total time: 0 seconds
... Failed Building Ant Distribution !
command "bash" "bootstrap.sh" "-Ddist.dir=/gnu/store/jd6jm79d0r5g59d0l2l3w445adykp5p9-ant-bootstrap-1.8.4" failed with status 1
builder for `/gnu/store/76apf0hpcdabpjy0839nhkwgfrz3m8z5-ant-bootstrap-1.8.4.drv' failed with exit code 1
build of /gnu/store/76apf0hpcdabpjy0839nhkwgfrz3m8z5-ant-bootstrap-1.8.4.drv failed
View build log at '/var/log/guix/drvs/76/apf0hpcdabpjy0839nhkwgfrz3m8z5-ant-bootstrap-1.8.4.drv.bz2'.
guix build: error: build of `/gnu/store/76apf0hpcdabpjy0839nhkwgfrz3m8z5-ant-bootstrap-1.8.4.drv' failed
--8<---------------cut here---------------end--------------->8---

It fails quite quickly, so you can easily get a copy failing locally if
you want to test it out.

-- 
Chris