diff --git a/configure.py b/configure.py
index c437772..67a6cc2 100755
--- a/configure.py
+++ b/configure.py
@@ -105,6 +105,13 @@ WIN_LFLAGS64 = [
   '/LIBPATH:"c:/Program Files (x86)/Windows Kits/10/Lib/10.0.19041.0/ucrt/x64"',
 ] + WIN_LIBS
 
+LOCALAPPDATAR = str(subprocess.check_output('cmd.exe /c echo "%LOCALAPPDATA%"',
+                                            shell=True, stderr=subprocess.DEVNULL).splitlines()[0], 'ascii').replace('\\', '/')
+LOCALAPPDATA = LOCALAPPDATAR.replace('C:/', '/mnt/c/')
+ARDUINO_CLI = LOCALAPPDATA + '/Programs/arduino-ide/resources/app/lib/backend/resources/arduino-cli.exe'
+WINTMP = LOCALAPPDATA + '/Temp'
+WINTMPR = LOCALAPPDATAR + '/Temp'
+
 def Escape(path):
   return path.replace(' ', '\\ ').replace('(', '\\(').replace(')', '\\)')
 
@@ -388,7 +395,7 @@ def GenRun(target, script, options, sources):
   return target
 
 
-def OneShot(target, command, source, pool=None):
+def OneShot(target, source, command, pool=None):
   global output
   output += f'build {target}: oneshot {source}\n'
   output += f'  command = {command}\n'
diff --git a/esp32/BUILD b/esp32/BUILD
index 4fcbbd3..f8b432e 100644
--- a/esp32/BUILD
+++ b/esp32/BUILD
@@ -66,3 +66,45 @@ Run('$dst/gen/esp32_sim_opcodes.h', '$dst/gen/print-esp32-builtins')
 
 # Main Alias.
 Alias('esp32', ' '.join(ESP32_FILES))
+
+# Automate building / flashing.
+BOARDS = {
+  'esp32': '--fqbn=esp32:esp32:esp32:PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none',
+  'esp32s2': '--fqbn=esp32:esp32:esp32s2:CDCOnBoot=default,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PSRAM=disabled,PartitionScheme=default,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none',
+  'esp32s3': '--fqbn=esp32:esp32:esp32s3:PSRAM=disabled,FlashMode=qio,FlashSize=4M,LoopCore=1,EventsCore=1,USBMode=hwcdc,CDCOnBoot=default,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PartitionScheme=default,CPUFreq=240,UploadSpeed=921600,DebugLevel=none,EraseFlash=none',
+  'esp32c3': '--fqbn=esp32:esp32:esp32c3:CDCOnBoot=default,PartitionScheme=default,CPUFreq=160,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none',
+  'esp32cam': '--fqbn=esp32:esp32:esp32cam:CPUFreq=240,FlashMode=qio,PartitionScheme=huge_app,FlashFreq=80,DebugLevel=none,EraseFlash=none',
+}
+for board in BOARDS:
+  options = BOARDS[board]
+  Command(f'$dst/esp32/{board}_build/flash.not',
+          '$dst/esp32/ESP32forth/ESP32forth.ino',
+	        f"""\
+          rm -rf {WINTMP}/ueforth_esp32/ESP32forth/ && \
+          cp -r $dst/esp32/ESP32forth {WINTMP}/ueforth_esp32/ && \
+          cd {WINTMP} && \
+          {ARDUINO_CLI} compile """ + """\
+          --port $${PORT:-com3} --upload """ + f"""\
+          {options} \
+          --build-path ueforth_esp32/{board}_build \
+          --build-cache-path ueforth_esp32/{board}_cache \
+          ueforth_esp32/ESP32forth/ESP32forth.ino""")
+  Alias(f'{board}-flash', f'$dst/esp32/{board}_build/flash.not')
+  Command(f'$dst/esp32/{board}_build/ESP32forth.ino.bin',
+          '$dst/esp32/ESP32forth/ESP32forth.ino',
+	        f"""\
+          rm -rf {WINTMP}/ueforth_esp32/ESP32forth/ && \
+          cp -r $dst/esp32/ESP32forth {WINTMP}/ueforth_esp32/ && \
+          cd {WINTMP} && \
+          {ARDUINO_CLI} compile {options} \
+          --build-path ueforth_esp32/{board}_build \
+          --build-cache-path ueforth_esp32/{board}_cache \
+          ueforth_esp32/ESP32forth/ESP32forth.ino && \
+          cd - && \
+          cp {WINTMP}/ueforth_esp32/{board}_build/*.bin \
+          $dst/esp32/{board}_build/ESP32forth.ino.bin""")
+  Alias(f'{board}-build', f'$dst/esp32/{board}_build/ESP32forth.ino.bin')
+Alias('esp32all', ' '.join([i + '-build' for i in BOARDS.keys()]))
+
+Alias('putty', OneShot('$dst/gen/putty.not', '',
+                       '$${HOME}/Desktop/putty.exe -serial $${PORT:-com3} -sercfg 115200'))
diff --git a/esp32/builtins.cpp b/esp32/builtins.cpp
index 648b1fe..9c99d55 100644
--- a/esp32/builtins.cpp
+++ b/esp32/builtins.cpp
@@ -19,7 +19,7 @@ static char filename2[PATH_MAX];
 #include "esp32/faults.h"
 #include "common/calling.h"
 #include "common/interp.h"
-#include "esp32_boot.h"
+#include "gen/esp32_boot.h"
 
 // Work around lack of ftruncate
 static cell_t ResizeFile(cell_t fd, cell_t size) {
diff --git a/posix/BUILD b/posix/BUILD
index 5130d66..b4ffa1e 100644
--- a/posix/BUILD
+++ b/posix/BUILD
@@ -21,5 +21,7 @@ Alias('posix', ' '.join([
             '$dst/posix/ueforth', '$src/common/all_tests.fs'),
 ]))
 
-OneShot('install', 'sudo cp $dst/posix/ueforth /usr/bin/ueforth',
-        '$dst/posix/ueforth', pool='console')
+OneShot('install',
+        '$dst/posix/ueforth',
+        'sudo cp $dst/posix/ueforth /usr/bin/ueforth',
+        pool='console')