diff --git a/IMG_SFX b/IMG_SFX
index e952fcce..1f81ca0b 100644
--- a/IMG_SFX
+++ b/IMG_SFX
@@ -1 +1 @@
-20240701t155130z-f40f39d13
+20240702t180702z-f40f39d13
diff --git a/win_images/win_packaging.ps1 b/win_images/win_packaging.ps1
index 16a0ee66..b810e4bf 100644
--- a/win_images/win_packaging.ps1
+++ b/win_images/win_packaging.ps1
@@ -14,14 +14,16 @@ retryInstall git archiver psexec golang mingw StrawberryPerl; Check-Exit
 # Update service is required for dotnet
 Set-Service -Name wuauserv -StartupType "Manual"; Check-Exit
 
-# dotnet is required for wixtoolset
-# Allowing chocolaty to install dotnet breaks in an entirely
-# non-debuggable way.  Workaround this by installing it as
-# a server-feature first.
-Install-WindowsFeature -Name Net-Framework-Core; Check-Exit
-
-# Install wixtoolset for installer build & test.
-retryInstall wixtoolset; Check-Exit
+# Install dotnet as that's the best way to install WiX 4+
+# Choco does not support installing anything over WiX 3.14
+Invoke-WebRequest -Uri https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.ps1 -OutFile dotnet-install.ps1
+.\dotnet-install.ps1 -InstallDir 'C:\Program Files\dotnet'
+
+# Configure NuGet sources for dotnet to fetch wix (and other packages) from
+& 'C:\Program Files\dotnet\dotnet.exe' nuget add source https://api.nuget.org/v3/index.json -n nuget.org
+
+# Install wix
+& 'C:\Program Files\dotnet\dotnet.exe' tool install --global wix
 
 # Install Hyper-V
 Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All -NoRestart