diff --git a/.gitignore b/.gitignore
index d99a3d3..0894700 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,6 @@
 .DS_store
 .idea
 /.src-rev
-/build.properties
 attic
 build
 dist
diff --git a/README.md b/README.md
index 1590f49..87c12f8 100644
--- a/README.md
+++ b/README.md
@@ -14,17 +14,6 @@ defined by a series of options similar to those supported by `javac`.
 Suitable versions of these dependencies can be downloaded by running
 `make/build.sh`.
 
-### Building with Apache Ant
-
-The default configuration assumes that dependencies have been downloaded
-into the `build/deps` directory.
-These values can be overridden with project-specific local configuration values
-in `build.properties`, if it exists in the root directory of the repo.
-
-````
-    ant -f make/build.xml <target>
-````
-
 ### Building with GNU Make
 
 The default configuration uses values provided in `make/dependencies.gmk`,
diff --git a/make/README.md b/make/README.md
index fdfc50a..91ba85d 100644
--- a/make/README.md
+++ b/make/README.md
@@ -69,12 +69,12 @@ The makefile provides the following targets:
 
 ## File Locations
 
-| Files                | GNU Make                 | Ant                | IntelliJ          |
-|----------------------|--------------------------|--------------------|-------------------|
-| Default Dependencies | build/deps               | build/deps         | build/deps        |
-| Main Classes         | build/classes            | build/classes      | out/production    |
-| Test Classes         | build/JUnitTests/classes | build/test/classes | out/test          |
-| Test Work            | build/JUnitTests/work    | build/test/work    | build/test/work   |
-| Test Report          | build/JUnitTests/report  | build/test/report  |                   |
-| Image                | build/images/apidiff     | dist/apidiff       |                   |
-| Bundle               | build/images/apidiff.zip | dist/apidiff.zip   |                   |
+| Files                | GNU Make                 | IntelliJ          |
+|----------------------|--------------------------|-------------------|
+| Default Dependencies | build/deps               | build/deps        |
+| Main Classes         | build/classes            | out/production    |
+| Test Classes         | build/JUnitTests/classes | out/test          |
+| Test Work            | build/JUnitTests/work    | build/test/work   |
+| Test Report          | build/JUnitTests/report  |                   |
+| Image                | build/images/apidiff     |                   |
+| Bundle               | build/images/apidiff.zip |                   |
diff --git a/make/build.properties b/make/build.properties
deleted file mode 100644
index a955b77..0000000
--- a/make/build.properties
+++ /dev/null
@@ -1,33 +0,0 @@
-#
-# Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
-# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-#
-# This code is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License version 2 only, as
-# published by the Free Software Foundation.  Oracle designates this
-# particular file as subject to the "Classpath" exception as provided
-# by Oracle in the LICENSE file that accompanied this code.
-#
-# This code is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-# version 2 for more details (a copy is included in the LICENSE file that
-# accompanied this code).
-#
-# You should have received a copy of the GNU General Public License version
-# 2 along with this work; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-# or visit www.oracle.com if you need additional information or have any
-# questions.
-#
-
-# set locations here, or in ${root}/build.properties, or set on the
-# ant command line
-
-apidiff.build.resources = /opt
-
-build.version = 1.0
-build.milestone = dev
-build.number = b00
diff --git a/make/build.xml b/make/build.xml
deleted file mode 100644
index c2c28fb..0000000
--- a/make/build.xml
+++ /dev/null
@@ -1,219 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!--
- Copyright (c) 2007, 2023, Oracle and/or its affiliates. All rights reserved.
- DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-
- This code is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License version 2 only, as
- published by the Free Software Foundation.  Oracle designates this
- particular file as subject to the "Classpath" exception as provided
- by Oracle in the LICENSE file that accompanied this code.
-
- This code is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- version 2 for more details (a copy is included in the LICENSE file that
- accompanied this code).
-
- You should have received a copy of the GNU General Public License version
- 2 along with this work; if not, write to the Free Software Foundation,
- Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-
- Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- or visit www.oracle.com if you need additional information or have any
- questions.
--->
-
-<project name="apidiff" default="build" basedir="..">
-
-    <!-- ********** system-specific values ********************************* -->
-
-    <property file="build.properties"/>  <!-- for user overrides -->
-    <property file="make/build.properties"/>
-
-    <!-- ********** general useful values ********************************** -->
-
-    <property environment="env"/>
-
-    <property name="src.bin.dir" location="src/share/bin"/>
-    <property name="src.classes.dir" location="src/share/classes"/>
-    <property name="src.test.dir" location="test"/>
-    <property name="src.doc.dir" location="src/share/doc"/>
-    <property name="test.dir" location="test"/>
-    <property name="build.dir" location="build"/>
-    <property name="build.classes.dir" location="${build.dir}/classes" />
-    <property name="build.test.classes.dir" location="${build.dir}/test/classes" />
-    <property name="deps.dir" location="${build.dir}/deps" />
-    <property name="dist.dir" location="dist" />
-    <property name="dist.apidiff.dir" location="${dist.dir}/apidiff" />
-    <property name="dist.apidiff.zip" location="${dist.dir}/apidiff.zip" />
-
-    <!-- The following properties assume that the dependencies have been downloaded into build/deps. -->
-    <property name="daisydiff.jar" location="${deps.dir}/daisydiff/daisydiff-1.2/daisydiff.jar"/>
-    <property name="daisydiff.LICENSE" location="${deps.dir}/daisydiff/daisydiff-1.2/LICENSE.txt"/>
-    <property name="java-diff-utils.jar" location="${deps.dir}/java-diff-utils/java-diff-utils-4.12.jar"/>
-    <property name="java-diff-utils.LICENSE" location="${deps.dir}/java-diff-utils/LICENSE"/>
-    <property name="junit.jar" location="${deps.dir}/junit/junit-platform-console-standalone-1.9.2.jar "/>
-
-    <!-- ********** top level and shared targets *************************** -->
-
-    <target name="build" depends="dist-apidiff"
-        description="default build target: build apidiff for distribution"/>
-
-    <target name="clean" description="remove all generated files">
-        <delete dir="${build.dir}"/>
-        <delete dir="${dist.dir}"/>
-    </target>
-
-    <!-- ********** init *************************************************** -->
-
-    <target name="-init">
-        <tstamp>
-            <format property="build.date" pattern="MM/dd/yyyy"/>
-            <format property="build.date.time" pattern="MM/dd/yyyy hh:mm aa"/>
-        </tstamp>
-    </target>
-
-    <!-- ********** apidiff ************************************************** -->
-
-    <patternset id="apidiff.packages">
-        <include name="jdk/codetools/apidiff/**"/>
-    </patternset>
-
-    <target name="dist-apidiff"
-        depends="jar-apidiff,-dist-apidiff.bin,-dist-apidiff.doc,-dist-apidiff.legal,-dist-apidiff.lib"
-        description="build apidiff for distribution">
-        <zip destfile="${dist.apidiff.zip}" filesOnly="true" basedir="${dist.dir}">
-            <include name="apidiff/"/>
-        </zip>
-    </target>
-
-    <target name="-dist-apidiff.bin" depends="jar-apidiff,-dist-apidiff.doc">
-        <copy file="${src.bin.dir}/apidiff.sh" tofile="${dist.apidiff.dir}/bin/apidiff"/>
-        <chmod dir="${dist.apidiff.dir}" perm="+x">
-            <include name="bin/apidiff"/>
-        </chmod>
-    </target>
-
-    <target name="-dist-apidiff.doc" depends="-compile-apidiff.usage">
-        <mkdir dir="${dist.apidiff.dir}/doc/apidiff"/>
-        <copy todir="${dist.apidiff.dir}" file="${src.doc.dir}/README"/>
-        <copy todir="${dist.apidiff.dir}/doc/apidiff">
-            <fileset file="${build.dir}/apidiff/usage.txt"/>
-        </copy>
-    </target>
-
-    <target name="-dist-apidiff.legal">
-        <copy todir="${dist.apidiff.dir}" file="COPYRIGHT"/>
-        <copy todir="${dist.apidiff.dir}" file="LICENSE"/>
-        <copy todir="${dist.apidiff.dir}/legal/java-diff-utils" file="${java-diff-utils.LICENSE}"/>
-        <copy todir="${dist.apidiff.dir}/legal/daisydiff" file="${daisydiff.LICENSE}"/>
-    </target>
-
-    <target name="-dist-apidiff.lib">
-        <copy todir="${dist.apidiff.dir}/lib" file="${java-diff-utils.jar}"/>
-        <copy todir="${dist.apidiff.dir}/lib" file="${daisydiff.jar}"/>
-    </target>
-
-    <target name="jar-apidiff" depends="-init,-check-apidiff.jar" unless="apidiff.jar.ok">
-        <mkdir dir="${dist.apidiff.dir}/lib"/>
-        <jar destfile="${dist.apidiff.dir}/lib/apidiff.jar"
-            basedir="${build.classes.dir}" >
-            <manifest>
-                <attribute name="Built-By" value="${user.name}"/>
-                <attribute name="Class-Path" value="java-diff-utils-4.0.jar daisydiff.jar"/>
-                <attribute name="Main-Class" value="jdk.codetools.apidiff.Main"/>
-                <attribute name="apidiff-Name" value="apidiff"/>
-                <attribute name="apidiff-Version" value="${build.version}"/>
-                <attribute name="apidiff-Milestone" value="${build.milestone}"/>
-                <attribute name="apidiff-Build" value="${build.number}"/>
-                <attribute name="apidiff-BuildJavaVersion" value="${java.version}"/>
-                <attribute name="apidiff-BuildDate" value="${build.date.time}"/>
-            </manifest>
-            <include name="COPYRIGHT"/>
-            <include name="buildInfo.txt"/>
-            <patternset refid="apidiff.packages"/>
-        </jar>
-    </target>
-
-    <target name="-check-apidiff.jar" depends="compile-apidiff">
-        <dependset>
-            <srcfileset dir="${build.classes.dir}">
-                <patternset refid="apidiff.packages"/>
-            </srcfileset>
-            <targetfilelist dir="${dist.apidiff.dir}/lib" files="apidiff.jar"/>
-        </dependset>
-        <available property="apidiff.jar.ok" file="${dist.apidiff.dir}/lib/apidiff.jar"/>
-    </target>
-
-    <target name="compile-apidiff" depends="-compile-apidiff.classes,-compile-apidiff.resources"/>
-
-    <target name="-compile-apidiff.classes">
-        <mkdir dir="${build.classes.dir}"/>
-        <javac encoding="utf-8" source="17" target="17"
-            debug="true" debuglevel="source,lines"
-            srcdir="${src.classes.dir}"
-            destdir="${build.classes.dir}"
-            classpath="${build.classes.dir};${java-diff-utils.jar};${daisydiff.jar}"
-            includeantruntime="false">
-            <compilerarg value="-Xlint:all"/>
-            <patternset refid="apidiff.packages"/>
-        </javac>
-    </target>
-
-    <target name="test" depends="compile-apidiff.tests">
-        <junitlauncher haltonfailure="true">
-            <classpath path="${build.test.classes.dir};${build.classes.dir};${java-diff-utils.jar};${daisydiff.jar};${junit.jar}" />
-            <testclasses outputDir="${build.dir}/test/report">
-                <fileset dir="${build.test.classes.dir}"/>
-                <fork>
-                    <jvmarg line="--add-exports jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED"/>
-                    <jvmarg line="--add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED"/>
-                    <jvmarg line="--add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED"/>
-                </fork>
-            </testclasses>
-        </junitlauncher>
-    </target>
-
-    <target name="compile-apidiff.tests" depends="compile-apidiff">
-        <mkdir dir="${build.test.classes.dir}"/>
-        <javac encoding="utf-8" source="17" target="17"
-            debug="true" debuglevel="source,lines"
-            srcdir="${src.test.dir}/junit"
-            destdir="${build.test.classes.dir}"
-            classpath="${build.classes.dir};${java-diff-utils.jar};${daisydiff.jar};${junit.jar}"
-            includeantruntime="false">
-            <compilerarg value="-Xlint:all"/>
-            <compilerarg line="--add-modules jdk.compiler,jdk.jdeps"/>
-            <compilerarg line="--add-exports jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED"/>
-            <compilerarg line="--add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED"/>
-            <compilerarg line="--add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED"/>
-        </javac>
-    </target>
-
-    <target name="-compile-apidiff.resources">
-        <copy todir="${build.classes.dir}" file="COPYRIGHT"/>
-        <copy todir="${build.classes.dir}">
-            <fileset dir="${src.classes.dir}">
-                <patternset refid="apidiff.packages"/>
-                <include name="**/*.properties"/>
-                <include name="**/*.js"/>
-                <exclude name="**/*.java"/>
-            </fileset>
-        </copy>
-    </target>
-
-    <target name="-compile-apidiff.usage" depends="-compile-apidiff.classes">
-        <!-- generate the usage page from the command line help -->
-        <!-- have to set fork=true because otherwise output redirection gets screwed up -->
-        <mkdir dir="${build.dir}/apidiff"/>
-        <java fork="true" failonerror="true"
-            classname="jdk.codetools.apidiff.Main"
-            classpath="${build.classes.dir}"
-            output="${build.dir}/apidiff/usage.txt">
-            <jvmarg value="-Dprogram=apidiff"/>
-            <arg value="--help"/>
-        </java>
-    </target>
-
-</project>