wpkg-inkscape/packages/inkscape.xml

<?xml version="1.0" encoding="UTF-8"?>
<packages>
    <package id="inkscape"
             name="Inkscape"
             revision="12"
             reboot="false"
             priority="10">
        <variable name="PKG_VERSION" value="0.92.3" />
        <variable architecture="x86" name="OLD_INSTALL_PATH" value="%PROGRAMFILES%\Inkscape" />
        <variable architecture="x64" name="OLD_INSTALL_PATH" value="%PROGRAMFILES(x86)%\Inkscape" />
        <variable architecture="x86" name="MSI" value="%SOFTWARE%\inkscape\Inkscape-%PKG_VERSION%-x86.msi" />
        <variable architecture="x64" name="MSI" value="%SOFTWARE%\inkscape\Inkscape-%PKG_VERSION%-x64.msi" />

        <check type="uninstall" condition="exists" path="Inkscape %PKG_VERSION%" />

        <install include="remove" />
        <install cmd='msiexec /qn /i "%MSI%"' />
        <install cmd='%COMSPEC% /C del /q /f "%ALLUSERSPROFILE%\Bureau\Inkscape.lnk"'>
            <exit code="0" />
            <exit code="1" />
        </install>
        <install cmd='%COMSPEC% /C del /q /f "%PUBLIC%\Desktop\Inkscape %PKG_VERSION%.lnk"'>
            <exit code="0" />
            <exit code="1" />
        </install>

	<upgrade cmd='msiexec /qn /norestart /x{81922150-317E-4BB0-A31D-FF1C14F707C5}'>
            <exit code="any" />
        </upgrade>
        <upgrade include="install" />

        <downgrade include="install" />

        <remove cmd='%COMSPEC% /C IF EXIST "%OLD_INSTALL_PATH%\uninstall.exe" "%OLD_INSTALL_PATH%\uninstall.exe" /S' />
        <remove cmd='msiexec /qn /norestart /x "%MSI%"'>
          <exit code='any' />
        </remove>
    </package>
</packages>