diff --git a/qga/installer/qemu-ga.wxs b/qga/installer/qemu-ga.wxs
index 0950e8c6becc3..8a19aa1656517 100644
--- a/qga/installer/qemu-ga.wxs
+++ b/qga/installer/qemu-ga.wxs
@@ -1,17 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
-  <?ifndef env.QEMU_GA_VERSION ?>
-    <?error Environment variable QEMU_GA_VERSION undefined?>
-  <?endif?>
-
-  <?ifndef env.QEMU_GA_DISTRO ?>
-    <?error Environment variable QEMU_GA_DISTRO undefined?>
-  <?endif?>
-
-  <?ifndef env.QEMU_GA_MANUFACTURER ?>
-    <?error Environment variable QEMU_GA_MANUFACTURER undefined?>
-  <?endif?>
-
   <?ifndef var.Arch?>
     <?error Define Arch to 32 or 64?>
   <?endif?>
@@ -43,20 +31,20 @@
     Name="QEMU guest agent"
     Id="*"
     UpgradeCode="{EB6B8302-C06E-4BEC-ADAC-932C68A3A98D}"
-    Manufacturer="$(env.QEMU_GA_MANUFACTURER)"
-    Version="$(env.QEMU_GA_VERSION)"
+    Manufacturer="$(var.QEMU_GA_MANUFACTURER)"
+    Version="$(var.QEMU_GA_VERSION)"
     Language="1033">
     <?if $(var.Arch) = 32 ?>
     <Condition Message="Error: 32-bit version of Qemu GA can not be installed on 64-bit Windows.">NOT VersionNT64</Condition>
     <?endif?>
     <Package
-      Manufacturer="$(env.QEMU_GA_MANUFACTURER)"
+      Manufacturer="$(var.QEMU_GA_MANUFACTURER)"
       InstallerVersion="200"
       Languages="1033"
       Compressed="yes"
       InstallScope="perMachine"
       />
-    <Media Id="1" Cabinet="qemu_ga.$(env.QEMU_GA_VERSION).cab" EmbedCab="yes" />
+    <Media Id="1" Cabinet="qemu_ga.$(var.QEMU_GA_VERSION).cab" EmbedCab="yes" />
     <Property Id="WHSLogo">1</Property>
     <MajorUpgrade
       DowngradeErrorMessage="Error: A newer version of QEMU guest agent is already installed."
@@ -66,7 +54,7 @@
       <Directory Id="$(var.GaProgramFilesFolder)" Name="QEMU Guest Agent">
         <Directory Id="qemu_ga_directory" Name="Qemu-ga">
           <Component Id="qemu_ga" Guid="{908B7199-DE2A-4DC6-A8D0-27A5AE444FEA}">
-            <File Id="qemu_ga.exe" Name="qemu-ga.exe" Source="$(env.BUILD_DIR)/qga/qemu-ga.exe" KeyPath="yes" DiskId="1"/>
+            <File Id="qemu_ga.exe" Name="qemu-ga.exe" Source="$(var.BUILD_DIR)/qga/qemu-ga.exe" KeyPath="yes" DiskId="1"/>
             <ServiceInstall
               Id="ServiceInstaller"
               Type="ownProcess"
@@ -88,10 +76,10 @@
             <File Id="libstdc++-6.lib" Name="libstdc++-6.dll" Source="$(var.Mingw_bin)/libstdc++-6.dll" KeyPath="yes" DiskId="1"/>
           </Component>
           <Component Id="qga_vss_dll" Guid="{CB19C453-FABB-4BB1-ABAB-6B74F687BFBB}">
-            <File Id="qga_vss.dll" Name="qga-vss.dll" Source="$(env.BUILD_DIR)/qga/vss-win32/qga-vss.dll" KeyPath="yes" DiskId="1"/>
+            <File Id="qga_vss.dll" Name="qga-vss.dll" Source="$(var.BUILD_DIR)/qga/vss-win32/qga-vss.dll" KeyPath="yes" DiskId="1"/>
           </Component>
           <Component Id="qga_vss_tlb" Guid="{D8D584B1-59C2-4FB7-A91F-636FF7BFA66E}">
-            <File Id="qga_vss.tlb" Name="qga-vss.tlb" Source="$(env.BUILD_DIR)/qga/vss-win32/qga-vss.tlb" KeyPath="yes" DiskId="1"/>
+            <File Id="qga_vss.tlb" Name="qga-vss.tlb" Source="$(var.BUILD_DIR)/qga/vss-win32/qga-vss.tlb" KeyPath="yes" DiskId="1"/>
           </Component>
           <?endif?>
           <?if $(var.Arch) = "32"?>
@@ -133,9 +121,9 @@
           </Component>
           <Component Id="registry_entries" Guid="{D075D109-51CA-11E3-9F8B-000C29858960}">
             <RegistryKey Root="HKLM"
-                         Key="Software\$(env.QEMU_GA_MANUFACTURER)\$(env.QEMU_GA_DISTRO)\Tools\QemuGA">
+                         Key="Software\$(var.QEMU_GA_MANUFACTURER)\$(var.QEMU_GA_DISTRO)\Tools\QemuGA">
               <RegistryValue Type="string" Name="ProductID" Value="fb0a0d66-c7fb-4e2e-a16b-c4a3bfe8d13b" />
-              <RegistryValue Type="string" Name="Version" Value="$(env.QEMU_GA_VERSION)" />
+              <RegistryValue Type="string" Name="Version" Value="$(var.QEMU_GA_VERSION)" />
             </RegistryKey>
           </Component>
         </Directory>
diff --git a/qga/meson.build b/qga/meson.build
index 35fe2229e919b..31370405f9319 100644
--- a/qga/meson.build
+++ b/qga/meson.build
@@ -122,15 +122,14 @@ if targetos == 'windows'
                             output: 'qemu-ga-@0@.msi'.format(host_arch),
                             depends: deps,
                             command: [
-                              find_program('env'),
-                              'QEMU_GA_VERSION=' + config_host['QEMU_GA_VERSION'],
-                              'QEMU_GA_MANUFACTURER=' + config_host['QEMU_GA_MANUFACTURER'],
-                              'QEMU_GA_DISTRO=' + config_host['QEMU_GA_DISTRO'],
-                              'BUILD_DIR=' + meson.build_root(),
                               wixl, '-o', '@OUTPUT0@', '@INPUT0@',
                               qemu_ga_msi_arch[cpu],
                               qemu_ga_msi_vss,
+                              '-D', 'BUILD_DIR=' + meson.build_root(),
                               '-D', 'Mingw_bin=' + config_host['QEMU_GA_MSI_MINGW_BIN_PATH'],
+                              '-D', 'QEMU_GA_VERSION=' + config_host['QEMU_GA_VERSION'],
+                              '-D', 'QEMU_GA_MANUFACTURER=' + config_host['QEMU_GA_MANUFACTURER'],
+                              '-D', 'QEMU_GA_DISTRO=' + config_host['QEMU_GA_DISTRO'],
                             ])
     all_qga += [qga_msi]
     alias_target('msi', qga_msi)