diff --git a/utils/build-windows-toolchain.bat b/utils/build-windows-toolchain.bat
index 477caf3d8d136..10b87b4f0b2a5 100644
--- a/utils/build-windows-toolchain.bat
+++ b/utils/build-windows-toolchain.bat
@@ -932,9 +932,7 @@ setlocal enableextensions enabledelayedexpansion
 msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\bld\bld.wixproj ^
   -restore ^
   -p:Configuration=Release ^
-  -p:IntermediateOutputPath=%PackageRoot%\bld\ ^
-  -p:OutputPath=%PackageRoot%\bld\ ^
-  -p:RunWixToolsOutOfProc=true ^
+  -p:BaseOutputPath=%PackageRoot%\bld\ ^
   -p:DEVTOOLS_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:TOOLCHAIN_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain
 :: TODO(compnerd) actually perform the code-signing
@@ -944,9 +942,7 @@ msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\bld\bld.wixproj ^
 msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\cli\cli.wixproj ^
   -restore ^
   -p:Configuration=Release ^
-  -p:IntermediateOutputPath=%PackageRoot%\cli\ ^
-  -p:OutputPath=%PackageRoot%\cli\ ^
-  -p:RunWixToolsOutOfProc=true ^
+  -p:BaseOutputPath=%PackageRoot%\cli\ ^
   -p:DEVTOOLS_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:TOOLCHAIN_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain
 :: TODO(compnerd) actually perform the code-signing
@@ -956,9 +952,7 @@ msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\cli\cli.wixproj ^
 msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\dbg\dbg.wixproj ^
   -restore ^
   -p:Configuration=Release ^
-  -p:IntermediateOutputPath=%PackageRoot%\dbg\ ^
-  -p:OutputPath=%PackageRoot%\dbg\ ^
-  -p:RunWixToolsOutOfProc=true ^
+  -p:BaseOutputPath=%PackageRoot%\dbg\ ^
   -p:DEVTOOLS_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:TOOLCHAIN_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain
 :: TODO(compnerd) actually perform the code-signing
@@ -968,9 +962,7 @@ msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\dbg\dbg.wixproj ^
 msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\ide\ide.wixproj ^
   -restore ^
   -p:Configuration=Release ^
-  -p:IntermediateOutputPath=%PackageRoot%\ide\ ^
-  -p:OutputPath=%PackageRoot%\ide\ ^
-  -p:RunWixToolsOutOfProc=true ^
+  -p:BaseOutputPath=%PackageRoot%\ide\ ^
   -p:DEVTOOLS_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:TOOLCHAIN_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain
 :: TODO(compnerd) actually perform the code-signing
@@ -980,40 +972,34 @@ msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\ide\ide.wixproj ^
 msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\sdk\sdk.wixproj ^
   -restore ^
   -p:Configuration=Release ^
-  -p:IntermediateOutputPath=%PackageRoot%\sdk\ ^
-  -p:OutputPath=%PackageRoot%\sdk\ ^
-  -p:RunWixToolsOutOfProc=true ^
+  -p:BaseOutputPath=%PackageRoot%\sdk\ ^
   -p:PLATFORM_ROOT=%PlatformRoot%\ ^
   -p:SDK_ROOT=%SDKInstallRoot%\
 :: TODO(compnerd) actually perform the code-signing
 :: signtool sign /f Apple_CodeSign.pfx /p Apple_CodeSign_Password /tr http://timestamp.digicert.com /fd sha256 %PackageRoot%\sdk\sdk.msi
 
 :: Package runtime.msi
-msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\runtime\runtime.wixproj ^
+msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\runtimemsi\runtimemsi.wixproj ^
   -restore ^
   -p:Configuration=Release ^
-  -p:IntermediateOutputPath=%PackageRoot%\runtime\ ^
-  -p:OutputPath=%PackageRoot%\runtime\ ^
-  -p:RunWixToolsOutOfProc=true ^
+  -p:BaseOutputPath=%PackageRoot%\runtime\ ^
   -p:SDK_ROOT=%SDKInstallRoot%\
 :: TODO(compnerd) actually perform the code-signing
 :: signtool sign /f Apple_CodeSign.pfx /p Apple_CodeSign_Password /tr http://timestamp.digicert.com /fd sha256 %PackageRoot%\runtime\runtime.msi
 
 :: Collate MSIs
-move %PackageRoot%\bld\bld.msi %PackageRoot% || (exit /b)
-move %PackageRoot%\cli\cli.msi %PackageRoot% || (exit /b)
-move %PackageRoot%\dbg\dbg.msi %PackageRoot% || (exit /b)
-move %PackageRoot%\ide\ide.msi %PackageRoot% || (exit /b)
-move %PackageRoot%\sdk\sdk.msi %PackageRoot% || (exit /b)
-move %PackageRoot%\runtime\runtime.msi %PackageRoot% || (exit /b)
+move %PackageRoot%\bld\Release\amd64\bld.msi %PackageRoot% || (exit /b)
+move %PackageRoot%\cli\Release\amd64\cli.msi %PackageRoot% || (exit /b)
+move %PackageRoot%\dbg\Release\amd64\dbg.msi %PackageRoot% || (exit /b)
+move %PackageRoot%\ide\Release\amd64\ide.msi %PackageRoot% || (exit /b)
+move %PackageRoot%\sdk\Release\amd64\sdk.msi %PackageRoot% || (exit /b)
+move %PackageRoot%\runtime\Release\amd64\runtime.msi %PackageRoot% || (exit /b)
 
 :: Build Installer
 msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\bundle\installer.wixproj ^
   -restore ^
   -p:Configuration=Release ^
-  -p:IntermediateOutputPath=%PackageRoot%\installer\ ^
-  -p:OutputPath=%PackageRoot%\installer\ ^
-  -p:RunWixToolsOutOfProc=true ^
+  -p:BaseOutputPath=%PackageRoot%\installer\ ^
   -p:MSI_LOCATION=%PackageRoot%\
 :: TODO(compnerd) actually perform the code-signing
 :: signtool sign /f Apple_CodeSign.pfx /p Apple_CodeSign_Password /tr http://timestamp.digicert.com /fd sha256 %PackageRoot%\installer\installer.exe
@@ -1035,7 +1021,7 @@ move %PackageRoot%\sdk.msi %BuildRoot%\artifacts || (exit /b)
 :: runtime
 move %PackageRoot%\runtime.msi %BuildRoot%\artifacts || (exit /b)
 :: installer
-move %PackageRoot%\installer\installer.exe %BuildRoot%\artifacts || (exit /b)
+move %PackageRoot%\installer\Release\amd64\installer.exe %BuildRoot%\artifacts || (exit /b)
 
 goto :eof
 endlocal