diff --git a/build/build.xml b/build/build.xml
index 2a06a89c6..a0bad6329 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -30,39 +30,11 @@
   <property name="examples.dir"
             location="../../processing-docs/content/examples" />
 
-  <!-- detect Raspberry Pi (TODO move this, jdk.data.model is set later) -->
-  <condition property="linux-arm32" value="linux-arm32">
-    <and>
-      <equals arg1="${target-platform}" arg2="linux" />
-      <equals arg1="${os.arch}" arg2="arm" />
-      <equals arg1="${jdk.data.model}" arg2="32" />
-    </and>
-  </condition>
-  <condition property="linux-arm64" value="linux-arm64">
-    <and>
-      <equals arg1="${target-platform}" arg2="linux" />
-      <equals arg1="${os.arch}" arg2="aarch64" />
-      <equals arg1="${jdk.data.model}" arg2="64" />
-    </and>
-  </condition>
-
-  <!-- there is currently no JRE available for ARM -->
-  <target name="check-linux-arm32" if="linux-arm32">
-    <property name="jdk.download.jdk" value="true" />
-    <property name="jdk.downloader" value="linux-arm32-vfp-hflt.tar.gz" />
-    <property name="linux.dist" value="linux/processing-${version}-linux-armv6hf.tgz" />
-    <property name="launch4j.variant" value="linux-armv6hf" />
-  </target>
-  <target name="check-linux-arm64" if="linux-arm64">
-    <property name="jdk.download.jdk" value="true" />
-    <property name="jdk.downloader" value="linux-arm64-vfp-hflt.tar.gz" />
-    <property name="linux.dist" value="linux/processing-${version}-linux-arm64.tgz" />
-  </target>
-
   <!-- 17.0.1+12 -->
   <property name="jdk.train" value="17" />
   <property name="jdk.detail" value="${jdk.train}.0.1" />
   <property name="jdk.build" value="12" />
+  <property name="jdk.folder" value="jdk-${jdk.detail}+${jdk.build}" />
 
 
   <!-- Require Java ${train} everywhere. -->
@@ -77,9 +49,12 @@
     </condition>
   </fail>
 
+
+  <!-- Identify optional JDK files that can be removed to save space. -->
+
   <fileset dir="macos/work/Processing.app/Contents" id="jdk-optional-macos">
     <!-- src.zip is 52 MB and we absolutely do not need it -->
-    <include name="PlugIns/jdk-${jdk.detail}+${jdk.build}/Contents/Home/lib/src.zip" />
+    <include name="PlugIns/${jdk.folder}/Contents/Home/lib/src.zip" />
   </fileset>
 
   <fileset dir="windows/work" id="jdk-optional-windows">
@@ -90,30 +65,40 @@
     <include name="java/lib/src.zip" />
   </fileset>
 
+
   <!-- Macro to help set the platform ant vars appropriately -->
+
+  <!--
   <macrodef name="set-target">
-    <attribute name="platform"/>
-    <attribute name="datamodel"/>
+    <attribute name="platform" />
+    <attribute name="arch" />
     <sequential>
       <property name="host-platform" value="${platform}" />
 
-      <!-- Set a property named macos, linux, or windows.
-           The 'value' chosen is arbitrary. -->
+      <!- - set the target plaform to the platform attribute passed in - ->
       <property name="target-platform" value="@{platform}" />
+
+      <!- - Set a property named macos, linux, or windows.
+           The 'value' chosen is arbitrary. - ->
       <property name="${target-platform}" value="${target-platform}" />
 
-      <!-- JDK archive saved as .zip on Windows, .tgz on macOS and Linux -->
-      <condition property="jdk.archive.ext" value="zip" else="tgz">
-        <os family="windows" />
-      </condition>
-
-      <property name="jdk.archive.path" value="${target-platform}/jdk-${jdk.detail}.${jdk.archive.ext}" />
-
       <property name="jdk.data.model" value="@{datamodel}" />
     </sequential>
   </macrodef>
+  -->
+
+
+  <!-- Downloading the JDK -->
 
   <target name="jdk-check">
+    <!-- JDK archive saved as .zip on Windows, .tgz on macOS and Linux -->
+    <condition property="jdk.archive.ext" value="zip" else="tgz">
+      <os family="windows" />
+    </condition>
+
+    <property name="jdk.archive.path"
+              value="${platform}/jdk-${jdk.detail}.${jdk.archive.ext}" />
+
     <echo message="Checking for ${jdk.archive.path}" />
     <available file="${jdk.archive.path}" property="jdk.archive.downloaded" />
     <!-- <echo message="Result: ${jdk.archive.downloaded}" /> -->
@@ -122,12 +107,13 @@
   <target name="jdk-download" depends="jdk-check"
           unless="jdk.archive.downloaded">
 
-    <!-- Windows is the outlier with the .zip extension (the others are .tar.gz) -->
+    <!-- Windows is the outlier with the .zip extension (the other downloads
+         are .tar.gz). Different from jdk.archive.ext which uses .tgz) -->
     <condition property="jdk.download.ext" value="zip" else="tar.gz">
       <os family="windows" />
     </condition>
 
-    <!-- platform prop works for Windows and Linux, but 'macos' needs to be 'mac' -->
+    <!-- ${platform} ok for Windows/Linux, but 'macos' needs to be 'mac' -->
     <condition property="jdk.download.os" value="mac" else="${platform}">
       <os family="mac" />
     </condition>
@@ -163,7 +149,7 @@
   </target>
 
   <!-- Set the version of Java that must be present to build. -->
-  <property name="jdk.path.macos" value="macos/jdk-${jdk.detail}+${jdk.build}" />
+  <property name="jdk.path.macos" value="macos/${jdk.folder}" />
   <available file="${jdk.path.macos}" property="macos_jdk_found" />
 
   <!--
@@ -196,40 +182,62 @@
   </fileset>
 
   <target name="build" description="Build Processing.">
-    <set-target platform="${platform}" datamodel="${sun.arch.data.model}" />
+    <antcall target="${platform}-build" />
+  </target>
+
+  <!--
+  <target name="build" description="Build Processing.">
+    <set-target platform="${platform}" arch="${os.arch}" />
     <antcall target="${target-platform}-build" />
   </target>
 
-  <target name="cross-build-macos" description="Build Processing.">
-    <set-target platform="macos" datamodel="64" />
+  <target name="cross-build-macos-aarch64"
+          description="Cross-build Processing for Apple Silicon">
+    <set-target platform="macos" arch="aarch64" />
     <antcall target="macos-build" />
   </target>
 
-  <target name="cross-build-linux-x64" description="Build Processing.">
-    <set-target platform="linux" datamodel="64" />
+  <target name="cross-build-macos-x86_64"
+          description="Cross-build Processing for macOS (64-bit Intel)">
+    <set-target platform="macos" arch="x86_64" />
+    <antcall target="macos-build" />
+  </target>
+
+  <target name="cross-build-linux-amd64"
+          description="Cross-build Processing for Linux (64-bit Intel)">
+    <set-target platform="linux" arch="amd64" />
     <antcall target="linux-build" />
   </target>
 
-  <target name="cross-build-linux-aarch64" description="Build Processing.">
-    <set-target platform="linux" datamodel="Arm" />
+  <target name="cross-build-linux-aarch64"
+          description="Cross-build Processing for Linux (64-bit ARM)">
+    <set-target platform="linux" arch="aarch64" />
     <antcall target="linux-build" />
   </target>
 
-  <target name="cross-build-windows" description="Build Processing.">
-    <set-target platform="windows" datamodel="64" />
+  <target name="cross-build-linux-arm"
+          description="Cross-build Processing for Linux (32-bit ARM)">
+    <set-target platform="linux" arch="arm" />
+    <antcall target="linux-build" />
+  </target>
+
+  <target name="cross-build-windows"
+          description="Cross-build Processing for Windows (64-bit Intel)">
+    <set-target platform="windows" arch="amd64" />
     <antcall target="windows-build" />
   </target>
 
   <target name="run" description="Run Processing.">
-    <set-target platform="${platform}" datamodel="${sun.arch.data.model}" />
+    <set-target platform="${platform}" arch="${os.arch}" />
     <antcall target="${target-platform}-run" />
   </target>
+  -->
 
   <!-- Run the app in a more "native" manner, i.e. no additional
        console for debugging. Ensures that double-clicking shortcuts
        and other desktop integration features work properly. -->
   <target name="app" description="Run Processing w/o console.">
-    <antcall target="${target-platform}-run-app" />
+    <antcall target="${platform}-run-app" />
   </target>
 
   <target name="dist" depends="revision-check, test"
@@ -246,7 +254,7 @@
       <arg line="pull" />
     </exec>
 
-    <antcall target="${target-platform}-dist" />
+    <antcall target="${platform}-dist" />
   </target>
 
   <!-- "§$§$&, ant doesn't have a built-in help target :(  -->
@@ -456,7 +464,7 @@
     <mkdir dir="macos/work" />
 
     <!-- Extract JDK -->
-    <echo message="Target jdk: ${jdk.archive.path}"/>
+    <echo message="Extracting JDK from ${jdk.archive.path}"/>
     <exec executable="tar" dir="macos">
       <!-- Change directory -->
       <!--
@@ -468,9 +476,6 @@
       <arg value="../${jdk.archive.path}"/>
     </exec>
 
-    <!-- does not appear to be in use -->
-    <!-- <property name="jdk.dir" value="macos/work/jdk-${jdk.detail}+${jdk.build}.jdk/" /> -->
-
     <!-- https://github.com/processing/processing4/issues/284 -->
     <copy file="macos/appbundler-${os.arch}.jar"
           tofile="macos/appbundler.jar" />
@@ -618,22 +623,22 @@
          Unix systems, we need to use <exec executable="cp" ... > instead -->
     <exec executable="cp">
       <arg value="-r"/>
-      <arg line="${jdk.path.macos}/Contents/Home/bin macos/work/Processing.app/Contents/PlugIns/jdk-${jdk.detail}+${jdk.build}/Contents/Home/bin"/>
+      <arg line="${jdk.path.macos}/Contents/Home/bin macos/work/Processing.app/Contents/PlugIns/${jdk.folder}/Contents/Home/bin"/>
     </exec>
 
     <exec executable="cp">
       <arg value="-r"/>
-      <arg line="${jdk.path.macos}/Contents/Home/jmods macos/work/Processing.app/Contents/PlugIns/jdk-${jdk.detail}+${jdk.build}/Contents/Home/jmods"/>
+      <arg line="${jdk.path.macos}/Contents/Home/jmods macos/work/Processing.app/Contents/PlugIns/${jdk.folder}/Contents/Home/jmods"/>
     </exec>
 
     <exec executable="cp">
       <arg value="-r"/>
-      <arg line="${jdk.path.macos}/Contents/Home/legal macos/work/Processing.app/Contents/PlugIns/jdk-${jdk.detail}+${jdk.build}/Contents/Home/legal"/>
+      <arg line="${jdk.path.macos}/Contents/Home/legal macos/work/Processing.app/Contents/PlugIns/${jdk.folder}/Contents/Home/legal"/>
     </exec>
 
     <exec executable="cp">
       <arg value="-r"/>
-      <arg line="${jdk.path.macos}/Contents/Home/conf macos/work/Processing.app/Contents/PlugIns/jdk-${jdk.detail}+${jdk.build}/Contents/Home/conf"/>
+      <arg line="${jdk.path.macos}/Contents/Home/conf macos/work/Processing.app/Contents/PlugIns/${jdk.folder}/Contents/Home/conf"/>
     </exec>
 
     <property name="contents.dir"
@@ -737,7 +742,7 @@
       <arg value="--entitlements" />
       <arg value="../ffs.entitlements" />
 
-      <arg value="Processing.app/Contents/PlugIns/jdk-${jdk.detail}+${jdk.build}" />
+      <arg value="Processing.app/Contents/PlugIns/${jdk.folder}" />
     </exec>
 
     <!-- codesign can't work inside jars? so instead temporarily unpack the files
@@ -1010,12 +1015,10 @@
       <arg value="../${jdk.archive.path}"/>
     </exec>
 
-    <property name="jdk.dir" value="jdk-${jdk.detail}+${jdk.build}/" />
-
     <exec executable="rsync" dir="linux">
       <arg value="-a" />
       <arg value="--delete" />
-      <arg value="${jdk.dir}" />
+      <arg value="${jdk.folder}/" />
       <arg value="work/java/" />
     </exec>
 
@@ -1026,7 +1029,7 @@
 
     <exec executable="rm">
       <arg value="-r"/>
-      <arg line="linux/jdk-${jdk.detail}+${jdk.build}"/>
+      <arg line="linux/${jdk.folder}"/>
     </exec>
   </target>
 
@@ -1070,97 +1073,89 @@
   </target>
 
   <target name="deb" depends="dist"
-          description="Build .deb of linux version">
+          description="Build .deb of the Linux version">
 
-   <!-- start with a clean debian folder -->
-   <delete dir="linux/debian" quiet="true" />
+    <!-- start with a clean debian folder -->
+    <delete dir="linux/debian" quiet="true" />
 
-   <!-- setup the file structure -->
-   <mkdir dir="linux/debian/opt" />
-   <mkdir dir="linux/debian/usr/bin" />
-   <mkdir dir="linux/debian/usr/share/applications/" />
-   <mkdir dir="linux/debian/usr/share/mime/packages/" />
-   <!-- rename the work folder temporarily -->
-   <move file="linux/work" tofile="linux/debian/opt/processing" />
-   <symlink link="linux/debian/usr/bin/processing"
-            resource="../../opt/processing/processing" />
-   <symlink link="linux/debian/usr/bin/processing-java"
-            resource="../../opt/processing/processing-java" />
+    <!-- setup the file structure -->
+    <mkdir dir="linux/debian/opt" />
+    <mkdir dir="linux/debian/usr/bin" />
+    <mkdir dir="linux/debian/usr/share/applications/" />
+    <mkdir dir="linux/debian/usr/share/mime/packages/" />
+    <!-- rename the work folder temporarily -->
+    <move file="linux/work" tofile="linux/debian/opt/processing" />
+    <symlink link="linux/debian/usr/bin/processing"
+             resource="../../opt/processing/processing" />
+    <symlink link="linux/debian/usr/bin/processing-java"
+             resource="../../opt/processing/processing-java" />
 
-   <!-- place .desktop and .sharedmimeinfo file -->
-   <copy file="linux/processing.desktop"
-         tofile="linux/debian/usr/share/applications/processing.desktop">
-       <filterchain>
-           <replacetokens>
-               <token key="version" value="${version}" />
-           </replacetokens>
-       </filterchain>
-   </copy>
-   <copy file="linux/processing.sharedmimeinfo"
-         tofile="linux/debian/usr/share/mime/packages/processing.xml" />
+    <!-- place .desktop and .sharedmimeinfo file -->
+    <copy file="linux/processing.desktop"
+          tofile="linux/debian/usr/share/applications/processing.desktop">
+      <filterchain>
+        <replacetokens>
+          <token key="version" value="${version}" />
+        </replacetokens>
+      </filterchain>
+    </copy>
 
-   <!-- Set properties for DEBIAN/control file -->
-   <condition property="linux.deb" value="linux/processing-${version}-linux-armv6hf.deb">
-     <equals arg1="${linux-arm32}" arg2="linux-arm32" />
-   </condition>
-   <condition property="linux.deb" value="linux/processing-${version}-linux-arm64.deb">
-     <equals arg1="${linux-arm64}" arg2="linux-arm64" />
-   </condition>
-   <property name="linux.deb" value="linux/processing-${version}-linux${jdk.data.model}.deb" />
+    <copy file="linux/processing.sharedmimeinfo"
+          tofile="linux/debian/usr/share/mime/packages/processing.xml" />
 
-   <!-- Raspbian seems to borrow armhf for armv6hf, so this works -->
-   <condition property="deb.arch" value="armhf">
-     <equals arg1="${linux-arm32}" arg2="linux-arm32" />
-   </condition>
-   <condition property="deb.arch" value="arm64">
-     <equals arg1="${linux-arm64}" arg2="linux-arm64" />
-   </condition>
-   <condition property="deb.arch" value="i386">
-     <equals arg1="${jdk.data.model}" arg2="32" />
-   </condition>
-   <condition property="deb.arch" value="amd64">
-     <equals arg1="${jdk.data.model}" arg2="64" />
-   </condition>
+    <!-- Set properties for DEBIAN/control file -->
 
-   <length property="deb.bsize" >
-     <fileset dir="linux/debian" />
-   </length>
+    <!-- Testing on a Model 3 (not plus), 4, and 400,
+         uname is armv7l with raspios dated 2021-10-30.
+         For most platforms, use os.arch, but use "armv7l" for
+         32-bit pi because just "arm" is unhelpful/ambiguous. -->
+    <condition property="deb.arch" value="armv7l" else="${os.arch}">
+      <equals arg1="${os.arch}" arg2="arm" />
+    </condition>
 
-   <script language="javascript">
-     <![CDATA[
-        var length_bytes = project.getProperty("deb.bsize");
-        var length_kbytes = Math.ceil(length_bytes / 1024);
-        project.setNewProperty("deb.kbsize", length_kbytes);
-     ]]>
-   </script>
+    <property name="linux.deb"
+              value="linux/processing-${version}-linux-${deb.arch}.deb" />
 
-  <!-- place DEBIAN/control file. -->
-   <mkdir dir="linux/debian/DEBIAN" />
-   <copy file="linux/control" tofile="linux/debian/DEBIAN/control" >
-       <filterchain>
-           <replacetokens >
-               <token key="version" value="${version}" />
-               <token key="size" value="${deb.kbsize}" />
-               <token key="arch" value="${deb.arch}" />
-           </replacetokens>
-       </filterchain >
-   </copy >
-   <copy file="linux/copyright" tofile="linux/debian/DEBIAN/copyright" />
+    <length property="deb.bsize" >
+      <fileset dir="linux/debian" />
+    </length>
 
-   <!-- Create .deb file -->
-   <exec executable="fakeroot" dir="linux" failonerror="true">
-     <arg value="dpkg-deb" />
-     <arg value="--build" />
-     <arg value="debian" />
-     <arg value="../${linux.deb}" />
-   </exec>
+    <!-- guessing that this will not be working with Java 17 w/o JS -->
+    <script language="javascript">
+      <![CDATA[
+         var length_bytes = project.getProperty("deb.bsize");
+         var length_kbytes = Math.ceil(length_bytes / 1024);
+         project.setNewProperty("deb.kbsize", length_kbytes);
+      ]]>
+    </script>
 
-   <!-- put... the candle... back -->
-   <!-- (rename the debian processing version to work) -->
-   <move file="linux/debian/opt/processing" tofile="linux/work" />
+   <!-- place DEBIAN/control file. -->
+    <mkdir dir="linux/debian/DEBIAN" />
+    <copy file="linux/control" tofile="linux/debian/DEBIAN/control" >
+      <filterchain>
+        <replacetokens>
+          <token key="version" value="${version}" />
+          <token key="size" value="${deb.kbsize}" />
+          <token key="arch" value="${deb.arch}" />
+        </replacetokens>
+      </filterchain >
+    </copy >
+    <copy file="linux/copyright" tofile="linux/debian/DEBIAN/copyright" />
 
-   <!-- cleanup -->
-   <delete dir="linux/debian" />
+    <!-- Create .deb file -->
+    <exec executable="fakeroot" dir="linux" failonerror="true">
+      <arg value="dpkg-deb" />
+      <arg value="--build" />
+      <arg value="debian" />
+      <arg value="../${linux.deb}" />
+    </exec>
+
+    <!-- put... the candle... back -->
+    <!-- (rename the debian processing version to work) -->
+    <move file="linux/debian/opt/processing" tofile="linux/work" />
+
+    <!-- cleanup -->
+    <delete dir="linux/debian" />
 
     <echo>
       ========================================================
@@ -1289,11 +1284,10 @@
            src="${jdk.archive.path}"
            overwrite="false" />
 
-    <property name="jdk.dir" value="windows/work/jdk-${jdk.detail}+${jdk.build}/" />
+    <!-- Rename the unpacked JDK to just 'java' and move to dist -->
+    <move file="windows/work/${jdk.folder}" tofile="windows/work/java" />
 
-    <move file="${jdk.dir}" tofile="windows/work/java" />
-
-    <!-- Remove unused JRE bloat. -->
+    <!-- Remove unused Java bloat -->
     <delete failonerror="true">
       <fileset refid="jdk-optional-windows" />
     </delete>