An appx packer
you must create a folder called appxpacker next to the executable and it needs to contain the following files:
appxpackaging.dll
appxsip.dll
makeappx.exe
MakeAppx.exe.manifest makecert.exe
mfdetours.dll
Microsoft.Diagnostics.Tracing.EventSource.dll
Microsoft.Windows.Build.Appx.AppxPackaging.dll.manifest
Microsoft.Windows.Build.Appx.AppxSip.dll.manifest
Microsoft.Windows.Build.Appx.OpcServices.dll.manifest
Microsoft.Windows.Build.Signing.mssign32.dll.manifest
Microsoft.Windows.Build.Signing.wintrust.dll.manifest
midlrtmd.dll
mrmsupport.dll
msisip.dll
mssign32.dll
opcservices.dll
provisioningtesthelper.dll
ProvisioningTestHelper.psd1
pvk2pfx.exe
signtool.exe
signtool.exe.manifest
tedutil.dll
wintrust.dll
wintrust.dll.ini
wsutilhelper.dll
these are obtainable via the windows kits (for uwp development) in visual studio