ABCL's build calls the hostname command, and needs the internet to download
JUnit. Neither of these are really required, though, so we can patch them out
to make it build.

We also remove the Implemetation-Build property that ends up in the manifest
file, because it stores information about the time of the build, which makes
it non-deterministic.

--- a/build.xml
+++ b/build.xml
@@ -338,7 +338,7 @@ from ${abcl.home.dir}
     <property name="abcl.build.path"
               value="${build.classes.dir}/org/armedbear/lisp/build"/>
     <target name="abcl.stamp" 
-            depends="abcl.compile,abcl.stamp.version,abcl.stamp.hostname">
+            depends="abcl.compile,abcl.stamp.version">
       <mkdir dir="${abcl.build.path}/.."/>
       <loadfile property="abcl.version"
                 srcFile="${abcl.version.path}"/>
@@ -479,11 +479,6 @@ Mercurial and Git.
                 value="${abcl.version}-${abcl.version.src}"/>
     </target>

-    <target name="abcl.stamp.hostname" if="unix">
-      <exec executable="hostname" outputproperty="abcl.hostname"/>
-      <echo>abcl.hostname: ${abcl.hostname}</echo>
-    </target>
-
     <target name="abcl.system.uptodate">
       <condition property="abcl.system.needs-update.p">
         <and>
@@ -524,8 +519,6 @@ Mercurial and Git.
                        value="ABCL"/>
             <attribute name="Implementation-Version"  
                        value="${abcl.version}"/>
-            <attribute name="Implementation-Build" 
-                       value="${build}"/>
           </section>
         </manifest>
         <metainf dir="${src.dir}/META-INF"> 
@@ -1050,8 +1043,7 @@ ${basedir}/../cl-bench
       </unzip>
     </target>
         
-    <target name="abcl.test.compile" 
-            depends="abcl.test.pre-compile">
+    <target name="abcl.test.compile" >
       <mkdir dir="${abcl.test.classes.dir}"/>
       <javac destdir="${abcl.test.classes.dir}"
              classpathref="abcl.test.compile.classpath"
5af49668960dfc8'>root</a>/<a href='/guix/log/HACKING?id=e3908ec5fb96a1fbdc144f5585af49668960dfc8'>HACKING</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/HACKING?id=e3908ec5fb96a1fbdc144f5585af49668960dfc8&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-10-23 12:57:20 -0400'>2020-10-23</span></td><td><a href='/guix/commit/HACKING?id=73faee9fb25465f1b236f5f94e1052145655736f'>doc: Fix typo in HACKING.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-01-09 23:33:04 +0100'>2020-01-09</span></td><td><a href='/guix/commit/HACKING?id=2d315cd428484537e763d7f7c676dc5fff7995f6'>doc: Move "Commit Access" section from 'HACKING' to the manual.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-09 23:33:04 +0100'>2020-01-09</span></td><td><a href='/guix/commit/HACKING?id=a7bde77d247ed0765f5378779d67b4668c5d7648'>doc: Add "Tracking Bugs and Patches" section.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-13 14:25:19 -0400'>2019-07-13</span></td><td><a href='/guix/commit/HACKING?id=06e1ecbf17fee7fe513ad2808d8175fb3565ae3e'>doc: Update keyserver URL.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2019-02-11 23:23:27 +0100'>2019-02-11</span></td><td><a href='/guix/commit/HACKING?id=6701edbfad62ba9572ffd35497df3db27b208ba5'>HACKING: Update key server.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-07-22 17:00:47 +0200'>2018-07-22</span></td><td><a href='/guix/commit/HACKING?id=5285192150c83db12136af6a123e03bb9b9dbe5f'>doc: Fix typo (missing period)</a><span class='msg-avail'>...</span></td><td>Pierre Neidhardt</td></tr>
<tr><td><span title='2017-08-19 13:42:52 +0530'>2017-08-19</span></td><td><a href='/guix/commit/HACKING?id=acabbd597678e1f0be995297bb009b6dd38ae795'>doc: Mention how to use emacs-debbugs.</a><span class='msg-avail'>...</span></td><td>Arun Isaac</td></tr>
<tr><td><span title='2017-03-27 00:13:18 +0200'>2017-03-27</span></td><td><a href='/guix/commit/HACKING?id=2fccc0d193497eb2ee3127270dea12be103f1bc2'>maint: Give command to install the pre-push hook.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-03-24 13:56:38 +0100'>2017-03-24</span></td><td><a href='/guix/commit/HACKING?id=ee7c21c7044355fc4c6bbe0906f061f6fbdfb79e'>maint: Mention the Signed-off-by line in 'HACKING'.</a><span class='msg-avail'>...</span></td><td>Clément Lassieur</td></tr>
<tr><td><span title='2017-03-15 15:19:53 +0100'>2017-03-15</span></td><td><a href='/guix/commit/HACKING?id=bc551cf32b6ccb3f8dd60b1d0d4e3c3e88cb1f8d'>maint: Mention guix-patches@gnu.org in 'HACKING'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-01-30 13:20:13 +0100'>2017-01-30</span></td><td><a href='/guix/commit/HACKING?id=8efc35a8902910ef7c09183c1d79d51498b2c10c'>maint: Fix invalid calls to 'info'.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2017-01-04 16:27:20 -0500'>2017-01-04</span></td><td><a href='/guix/commit/HACKING?id=69355e1283d300a663fb639ec426f10f3feb404b'>doc: Add a Git hook that verifies signatures before pushing.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2016-07-24 19:54:15 +0200'>2016-07-24</span></td><td><a href='/guix/commit/HACKING?id=20e29643449adbb9658c0d3bec9c8b117697fe41'>doc: Explain how to set up Git for signing.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-07-14 15:37:51 -0400'>2016-07-14</span></td><td><a href='/guix/commit/HACKING?id=a16db014d10659051037eb76a0424b46e94f2f2d'>doc: Mention commit signatures in HACKING.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>