diff --git a/mswin32/Makefile b/mswin32/Makefile
index 33c95b86e..470463a0e 100644
--- a/mswin32/Makefile
+++ b/mswin32/Makefile
@@ -55,8 +55,8 @@ stage-common: $(NMAPDIR)/CHANGELOG $(NMAPDIR)/LICENSE $(NMAPDIR)/nmap-mac-prefix
 # Install the ndiff batch file wrapper in the zip distribution.
 	cp $(NMAPDIR)/ndiff/ndiff.py nmap-$(NMAP_VERSION)/ndiff.py
 	cp python-wrap.bat nmap-$(NMAP_VERSION)/ndiff.bat
-	cd $(NMAPDIR)/zenmap && install_scripts/windows/copy_and_compile.bat
-	cp -R $(NMAPDIR)/zenmap/dist/* nmap-$(NMAP_VERSION)/
+	cd $(NMAPDIR)/zenmap && install_scripts/windows/build.sh
+	cp -R $(NMAPDIR)/zenmap/dist/zenmap-w64 nmap-$(NMAP_VERSION)/
 	cp $(NMAPDIR)/zenmap/README nmap-$(NMAP_VERSION)/ZENMAP_README
 	cp $(NMAPDIR)/zenmap/COPYING_HIGWIDGETS nmap-$(NMAP_VERSION)
 	cp $(NMAPDIR)/ndiff/README nmap-$(NMAP_VERSION)/NDIFF_README
@@ -73,7 +73,7 @@ stage-nmap-main: build-nmap${OEM_SUFFIX}
 	mkdir -p nmap-$(NMAP_VERSION)${OEM_SUFFIX}
 	cp $(VCCONFIG)${OEM_SUFFIX}/nmap.exe nmap-$(NMAP_VERSION)${OEM_SUFFIX}/
 
-sign-files: nmap-$(NMAP_VERSION)-oem/nmap.exe nmap-$(NMAP_VERSION)/nmap.exe nmap-$(NMAP_VERSION)/ncat.exe nmap-$(NMAP_VERSION)/nping.exe nmap-$(NMAP_VERSION)/ndiff.exe nmap-$(NMAP_VERSION)/zenmap.exe nmap-$(NMAP_VERSION)/libssh2.dll nmap-$(NMAP_VERSION)/libcrypto-3.dll nmap-$(NMAP_VERSION)/libssl-3.dll nmap-$(NMAP_VERSION)/zlibwapi.dll
+sign-files: nmap-$(NMAP_VERSION)-oem/nmap.exe nmap-$(NMAP_VERSION)/nmap.exe nmap-$(NMAP_VERSION)/ncat.exe nmap-$(NMAP_VERSION)/nping.exe nmap-$(NMAP_VERSION)/zenmap-w64/zenmap.exe nmap-$(NMAP_VERSION)/libssh2.dll nmap-$(NMAP_VERSION)/libcrypto-3.dll nmap-$(NMAP_VERSION)/libssl-3.dll nmap-$(NMAP_VERSION)/zlibwapi.dll
 	# TODO: evaluate whether we should also sign the Python stuff for Zenmap, Ndiff
 	"$(SIGNTOOL)" $(SIGNTOOL_ARGS) $^
 	touch sign-files
@@ -110,14 +110,8 @@ bundle-zip-main: sign-files
 	       || true
 	cp npcap-$(NPCAP_VERSION)${OEM_SUFFIX}.exe nmap-$(NMAP_VERSION)${OEM_SUFFIX}
 	zip -x nmap-$(NMAP_VERSION)${OEM_SUFFIX}/ZENMAP_README \
-	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/zenmap/\* \
-	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/zenmap.exe \
-	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/share/\* \
-	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/python27.dll \
-	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/py2exe/\* \
+	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/zenmap-w64/\* \
 	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/COPYING_HIGWIDGETS \
-	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/w9xpopen.exe \
-	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/ndiff.exe \
 	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/Uninstall.exe \
 	  nmap-$(NMAP_VERSION)${OEM_SUFFIX}/icon1.ico \
 	  -r nmap-$(NMAP_VERSION)${OEM_SUFFIX}-win32.zip nmap-$(NMAP_VERSION)${OEM_SUFFIX}
diff --git a/mswin32/nsis/Nmap.nsi b/mswin32/nsis/Nmap.nsi
index 9a7cefdef..6127f6bc9 100644
--- a/mswin32/nsis/Nmap.nsi
+++ b/mswin32/nsis/Nmap.nsi
@@ -285,25 +285,21 @@ SectionEnd
 Section "Zenmap (GUI Frontend)" SecZenmap
   SetOutPath "$INSTDIR"
   SetOverwrite on
-  File ${STAGE_DIR}\zenmap.exe
   File ${STAGE_DIR}\ZENMAP_README
   File ${STAGE_DIR}\COPYING_HIGWIDGETS
-  File ${STAGE_DIR}\python27.dll
-  File /r ${STAGE_DIR}\share
-  File /r ${STAGE_DIR}\py2exe
+  File /r ${STAGE_DIR}\zenmap-w64
+  WriteINIStr "$INSTDIR\zenmap-w64\mingw64\share\zenmap\config\zenmap.conf" paths nmap_command_path "$INSTDIR\nmap.exe"
+  WriteINIStr "$INSTDIR\zenmap-w64\mingw64\share\zenmap\config\zenmap.conf" paths ndiff_command_path "$INSTDIR\ndiff.bat"
   StrCpy $zenmapset "true"
-  Call vcredistinstaller
   Call create_uninstaller
 SectionEnd
 
 Section "Ndiff (Scan comparison tool)" SecNdiff
   SetOutPath "$INSTDIR"
   SetOverwrite on
-  File ${STAGE_DIR}\ndiff.exe
+  File ${STAGE_DIR}\ndiff.py
+  File ${STAGE_DIR}\ndiff.bat
   File ${STAGE_DIR}\NDIFF_README
-  File ${STAGE_DIR}\python27.dll
-  File /r ${STAGE_DIR}\py2exe
-  Call vcredistinstaller
   Call create_uninstaller
 SectionEnd
 !endif
diff --git a/zenmap/install_scripts/windows/PKGBUILD b/zenmap/install_scripts/windows/PKGBUILD
new file mode 100644
index 000000000..0045abaf5
--- /dev/null
+++ b/zenmap/install_scripts/windows/PKGBUILD
@@ -0,0 +1,34 @@
+# PKGBUILD for Zenmap targeting MinGW and MSYS2, for use in packaging Zenmap for Windows.
+# Expected invocation: makepkg-mingw -RdfL
+# -R: repackage, do not download source
+# -d: do not verify dependencies (Python 3 is the only build dependency)
+# -f: force, overwrite existing package.
+# -L: log progress to file
+_realname=zenmap
+pkgbase=mingw-w64-python-${_realname}
+pkgname=("${MINGW_PACKAGE_PREFIX}-python-${_realname}")
+provides=("${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
+conflicts=("${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
+replaces=("${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
+pkgver=$(echo NMAP_VERSION | $(CC) -E -imacros nmap.h - | sed -n '$s/[" ]//g;$p')
+pkgrel=1
+pkgdesc="Graphical Nmap frontend and results viewer"
+url="https://nmap.org/zenmap/"
+arch=("any")
+license=("NPSL")
+source=("https://nmap.org/dist/nmap-${pkgver}.tar.bz2")
+sha256sums=("SKIP")
+mingw_arch=('mingw64')
+depends=("${MINGW_PACKAGE_PREFIX}-python" "${MINGW_PACKAGE_PREFIX}-python-gobject")
+makedepends=("${MINGW_PACKAGE_PREFIX}-python-setuptools")
+
+package() {
+	# If this script is in zenmap/install_scripts/windows/PKGBUILD
+	# then a repackage (makepkg -R) will set srcdir=zenmap/install_scripts/windows/src
+	# We want to cd to zenmap/
+	cd "${srcdir}/../../.."
+	${MINGW_PREFIX}/bin/python setup.py build
+	MSYS2_ARG_CONV_EXCL="--prefix=" \
+		${MINGW_PREFIX}/bin/python setup.py install vanilla --prefix=${MINGW_PREFIX} --root="${pkgdir}" --optimize=1
+	install -Dm644 install_scripts/unix/zenmap.desktop "${pkgdir}${MINGW_PREFIX}/share/applications/zenmap.desktop"
+}
diff --git a/zenmap/install_scripts/windows/build.sh b/zenmap/install_scripts/windows/build.sh
new file mode 100644
index 000000000..a3e3ac685
--- /dev/null
+++ b/zenmap/install_scripts/windows/build.sh
@@ -0,0 +1,62 @@
+#!/bin/bash
+# bash shebang because MSYS2/Styrene require Bash, not just /bin/sh
+
+BUILDDIR=dist
+
+: << '#MULTILINE_COMMENT'
+# Setup environment
+pacman -S --needed zip mingw-w64-x86_64-{python3,gcc,nsis,binutils,git}
+pacman -S --needed mingw-w64-x86_64-python3-pip
+git clone https://github.com/achadwick/styrene.git
+git apply <<EOF
+diff --git a/styrene/bundle.py b/styrene/bundle.py
+index 7f5155e..e5c31d3 100644
+--- a/styrene/bundle.py
++++ b/styrene/bundle.py
+@@ -446,7 +446,7 @@ class NativeBundle:
+             - (?P<version> [^-]+ - \d+ )
+             - any
+             [.]pkg[.]tar
+-            (?: [.](?:gz|xz) )?
++            (?: [.](?:gz|xz|zst) )?
+             $
+         '''
+         keyobj = functools.cmp_to_key(self._vercmp)
+EOF
+cd styrene
+pip3 install .
+#MULTILINE_COMMENT
+
+# make the zenmap package
+makepkg-mingw -RdfL
+
+# make the minimal msys2 environment
+styrene -p . -o "$BUILDDIR" styrene.cfg --no-exe --no-zip
+
+# Clean up unused Python modules
+rm -rf "$BUILDDIR/**/*.opt-?.pyc"
+rm -rf "$BUILDDIR/distutils/"
+rm -rf "$BUILDDIR/pydoc_data/"
+rm -rf "$BUILDDIR/ctypes/"
+rm -rf "$BUILDDIR/asyncio/"
+rm -rf "$BUILDDIR/multiprocessing/"
+rm -rf "$BUILDDIR/html/"
+rm -rf "$BUILDDIR/msilib/"
+rm -rf "$BUILDDIR/venv/"
+rm -rf "$BUILDDIR/xmlrpc/"
+rm -rf "$BUILDDIR/concurrent/"
+rm -rf "$BUILDDIR/json/"
+rm -rf "$BUILDDIR/config-3.*/"
+rm -rf "$BUILDDIR/zoneinfo/"
+
+# Remove pacman database
+rm -rf var/lib/pacman/
+
+# fake a new install script for what we removed:
+mkdir -p var/lib/pacman/local/zenmap-fake-pkg/
+cat >var/lib/pacman/local/zenmap-fake-pkg/install <<EOF
+post_install() {
+    mingw64/bin/gtk-update-icon-cache -q -t -f mingw64/share/icons/hicolor
+    mingw64/bin/gtk-update-icon-cache -q -t -f mingw64/share/icons/Adwaita
+}
+EOF
diff --git a/zenmap/install_scripts/windows/styrene.cfg b/zenmap/install_scripts/windows/styrene.cfg
new file mode 100755
index 000000000..ba63cb940
--- /dev/null
+++ b/zenmap/install_scripts/windows/styrene.cfg
@@ -0,0 +1,117 @@
+# Styrene config file for Zenmap and Ndiff
+
+[bundle]
+
+# Packages to install into the bundle, separated by spaces.
+# Pacman will resolve dependencies automatically.
+# Substs: {pkg_prefix} for "mingw-w64-x86_64-" or "mingw-w64-i686-".
+# The first package is the main one: it provides the default metadata.
+packages = {pkg_prefix}python-zenmap {pkg_prefix}python-gobject {pkg_prefix}python {pkg_prefix}gtk3 msys2-runtime
+
+# Reduce some bundling time and size by skipping these prereqs we don't use
+assume_installed = {pkg_prefix}ncurses {pkg_prefix}expat {pkg_prefix}openssl {pkg_prefix}tcl {pkg_prefix}tk
+
+# The first part of generated installer or archive filenames.
+# Will be suffixed with the version, an architecture spec
+# like "-w64" or "-w32", and the appropriate filename extension.
+# Default: the main package's name (with {pkg_prefix} as "").
+filename_stub = zenmap
+
+# Display name for the bundle. Spaces are OK.
+# The suffix " (w32)" is appended for MINGW32 bundles.
+# Default: the filename stub
+display_name = Zenmap
+
+# Short human-readable description.
+description = Nmap GUI
+
+# Version number for the bundle.
+# Default: parsed from the main package's version.
+# version =
+
+# URLs that default to the main package's URL metadata.
+# url =
+
+# Launchers to install.
+# Entries here should name a desktop file,
+# or an equivalent section below.
+launchers =
+	zenmap.desktop
+	ndiff-launcher
+
+# Additional icons to explicitly convert.
+# These will be converted from the bundle's FreeDesktop.org PNG icons.
+# They are used in addition to the ones listed in the launchers.
+# The conversion only knows about Adwaita & the default hicolor theme.
+# The first converted icon will be used for the installer too [VOLATILE]
+; icons =
+
+# Surplus files and folders to be deleted.
+# Space-separated list of glob patterns rooted in $INSTDIR.
+
+delete = *
+
+
+# List files and directories you *don't* want to be deleted here.
+# If you're cleaning out $PREFIX/bin, you need to keep all the EXEs
+# which are called from the postinst.cmd.
+
+nodelete =
+    # The postinst scripts that GTK needs, followed by their binaries.
+    var/lib/pacman/local/mingw-w64-*-glib2-*-*/install
+    mingw*/bin/glib-compile-schemas*.exe
+    mingw*/share/glib*/schemas
+
+    var/lib/pacman/local/mingw-w64-*-gdk-pixbuf2-*-*/install
+    mingw*/bin/gdk-pixbuf-query-loaders*.exe
+
+    var/lib/pacman/local/mingw-w64-*-gtk3-*-*/install
+    mingw*/bin/gtk-query-immodules*.exe
+    mingw*/bin/gtk-update-icon-cache*.exe
+    usr/bin/mkdir.exe
+    usr/bin/msys-2*.dll
+
+    var/lib/pacman/local/mingw-w64-*-adwaita-icon-theme-*-*/install
+
+    var/lib/pacman/local/mingw-w64-*-hicolor-icon-theme-*-*/install
+
+    # Runtime requirements for the demos etc.
+    mingw*/etc/gtk-3.0
+    mingw*/bin/*.dll
+
+    mingw*/lib/gtk-3.0
+    mingw*/lib/gdk-pixbuf-2.0
+    mingw*/share/applications
+
+
+    # This is the most minimal subset for GTK. Breaks many demos.
+    mingw*/share/icons/**/window-*.symbolic.png   ; window surrounds
+    mingw*/share/icons/**/pan-*.symbolic.png  ; foldouts & arrows
+    mingw*/share/icons/**/process-working*  ; spinner (SVG)
+    mingw*/share/icons/**/index.theme
+    # Or to be certain, include all symbolic PNGS
+    mingw*/share/icons/**/*.symbolic.png
+
+    # python-gobject stuff
+    mingw*/lib/girepository-*
+    mingw*/lib/python3.*
+    mingw*/bin/pythonw.exe
+    mingw*/bin/libpython*.dll
+    # Zenmap's files (mostly in site-packages above)
+    mingw*/share/zenmap
+    # mingw*/bin/zenmap
+
+# Local launcher definitions
+
+; You can define new app launchers here, or extend the launchers in
+; installed .desktop files by overriding their keys.
+;
+; All launchers need to be listed in the [bundle]'s "launchers" key.
+[zenmap.desktop]
+exec = pythonw.exe -c 'from zenmapGUI.App import run; run()'
+icon = {msystem_subdir}/share/zenmap/pixmaps/zenmap.png
+; For debugging:
+;Terminal = true
+;exec = pythonw.exe -c 'from zenmapGUI.App import run; run()' -vvvvv
+[ndiff-launcher]
+exec = python.exe ../ndiff.py %F