diff --git a/platforms/Windows/SideBySideUpgradeStrategy.props b/platforms/Windows/SideBySideUpgradeStrategy.props
index ae79f273..ad9010cd 100644
--- a/platforms/Windows/SideBySideUpgradeStrategy.props
+++ b/platforms/Windows/SideBySideUpgradeStrategy.props
@@ -17,7 +17,7 @@
   -->
 
   <PropertyGroup>
-    <BldUpgradeCode>{7E95DC06-7F84-4E8E-A038-8304AF0468FB}</BldUpgradeCode>
+    <BldAssertsUpgradeCode>{7E95DC06-7F84-4E8E-A038-8304AF0468FB}</BldAssertsUpgradeCode>
     <CliUpgradeCode>{87019842-3F3E-4227-B5C5-23A8EF72AD89}</CliUpgradeCode>
     <DbgUpgradeCode>{91D382AF-1E92-44DC-A4AD-AEE91C1B5160}</DbgUpgradeCode>
     <IdeUpgradeCode>{8DD91C86-D13D-490B-B06B-9522A9CF504C}</IdeUpgradeCode>
@@ -54,7 +54,7 @@
     <DefineConstants>
       $(DefineConstants);
       BundleUpgradeCode=$(BundleUpgradeCode);
-      BldUpgradeCode=$(BldUpgradeCode);
+      BldAssertsUpgradeCode=$(BldAssertsUpgradeCode);
       CliUpgradeCode=$(CliUpgradeCode);
       DbgUpgradeCode=$(DbgUpgradeCode);
       IdeUpgradeCode=$(IdeUpgradeCode);
diff --git a/platforms/Windows/bld/bld.wixproj b/platforms/Windows/bld/asserts/bld.asserts.wixproj
similarity index 97%
rename from platforms/Windows/bld/bld.wixproj
rename to platforms/Windows/bld/asserts/bld.asserts.wixproj
index 0f3385e8..bd53ebaa 100644
--- a/platforms/Windows/bld/bld.wixproj
+++ b/platforms/Windows/bld/asserts/bld.asserts.wixproj
@@ -5,6 +5,7 @@
       _USR_LIB_CLANG=$(ImageRoot)\Toolchains\$(ProductVersion)+Asserts\usr\lib\clang;
       _USR_LIB_SWIFT_CLANG=$(ImageRoot)\Toolchains\$(ProductVersion)+Asserts\usr\lib\swift\clang;
     </DefineConstants>
+    <OutputName>bld.asserts</OutputName>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/platforms/Windows/bld/asserts/bld.wxs b/platforms/Windows/bld/asserts/bld.wxs
new file mode 100644
index 00000000..dd1084ce
--- /dev/null
+++ b/platforms/Windows/bld/asserts/bld.wxs
@@ -0,0 +1,3 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+  <?include ../bld.wxi ?>
+</Wix>
diff --git a/platforms/Windows/bld/bld.wxs b/platforms/Windows/bld/bld.wxi
similarity index 97%
rename from platforms/Windows/bld/bld.wxs
rename to platforms/Windows/bld/bld.wxi
index 0af0ebea..6fcde7aa 100644
--- a/platforms/Windows/bld/bld.wxs
+++ b/platforms/Windows/bld/bld.wxi
@@ -1,18 +1,19 @@
-<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+<?xml version="1.0" encoding="utf-8"?>
+<Include xmlns="http://wixtoolset.org/schemas/v4/wxs">
 
   <?define ToolchainRoot = $(ImageRoot)\Toolchains\$(ProductVersion)+Asserts?>
 
   <Package
       Language="1033"
       Manufacturer="!(loc.ManufacturerName)"
-      Name="!(loc.Bld_ProductName)"
-      UpgradeCode="$(BldUpgradeCode)"
+      Name="!(loc.BldAsserts_ProductName)"
+      UpgradeCode="$(BldAssertsUpgradeCode)"
       Version="$(NonSemVerProductVersion)"
       Scope="$(PackageScope)">
 
-    <Media Id="1" Cabinet="bld.cab" EmbedCab="$(ArePackageCabsEmbedded)" />
+    <Media Id="1" Cabinet="bld.asserts.cab" EmbedCab="$(ArePackageCabsEmbedded)" />
 
-    <WixVariable Id="SideBySidePackageUpgradeCode" Value="$(BldUpgradeCode)" />
+    <WixVariable Id="SideBySidePackageUpgradeCode" Value="$(BldAssertsUpgradeCode)" />
     <FeatureGroupRef Id="SideBySideUpgradeStrategy" />
 
     <DirectoryRef Id="_usr_include">
@@ -549,7 +550,7 @@
       </Component>
     </ComponentGroup>
 
-    <Feature Id="BuildTools" AllowAbsent="no" Title="!(loc.Bld_ProductName)">
+    <Feature Id="BuildTools" AllowAbsent="no" Title="!(loc.BldAsserts_ProductName)">
       <ComponentGroupRef Id="cmark_gfm" />
 
       <ComponentGroupRef Id="binutils" />
@@ -578,4 +579,4 @@
       <ComponentGroupRef Id="VersionedDirectoryCleanup" />
     </Feature>
   </Package>
-</Wix>
+</Include>
diff --git a/platforms/Windows/bundle/installer.wixproj b/platforms/Windows/bundle/installer.wixproj
index b62f1e58..598d0ab9 100644
--- a/platforms/Windows/bundle/installer.wixproj
+++ b/platforms/Windows/bundle/installer.wixproj
@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\bld\bld.wixproj" BindName="bld" />
+    <ProjectReference Include="..\bld\asserts\bld.asserts.wixproj" BindName="bld.asserts" />
     <ProjectReference Include="..\cli\cli.wixproj" BindName="cli" />
     <ProjectReference Include="..\dbg\dbg.wixproj" BindName="dbg" />
     <ProjectReference Include="..\ide\ide.wixproj" BindName="ide" />
diff --git a/platforms/Windows/bundle/installer.wxs b/platforms/Windows/bundle/installer.wxs
index 717a719b..ab18da59 100644
--- a/platforms/Windows/bundle/installer.wxs
+++ b/platforms/Windows/bundle/installer.wxs
@@ -82,7 +82,7 @@
       </MsiPackage>
 
       <MsiPackage
-        SourceFile="!(bindpath.bld)\bld.msi"
+        SourceFile="!(bindpath.bld.asserts)\bld.asserts.msi"
         DownloadUrl="$(BaseReleaseDownloadUrl)/{2}">
         <MsiProperty Name="INSTALLROOT" Value="[InstallRoot]" />
       </MsiPackage>
diff --git a/platforms/Windows/readme.md b/platforms/Windows/readme.md
index 80e8bd4f..c0b82312 100644
--- a/platforms/Windows/readme.md
+++ b/platforms/Windows/readme.md
@@ -216,7 +216,7 @@ Note that these GUIDs are substituted at bind time so they skip the normal valid
 
 | Property | Description |
 | -------- | ----------- |
-| BldUpgradeCode, CliUpgradeCode, DbgUpgradeCode, IdeUpgradeCode, RtlUpgradeCode, WindowsSDKUpgradeCode, AndroidSDKUpgradeCode | Upgrade codes for individual packages. Packages keep the same upgrade codes "forever" because MSI lets you specify version ranges for upgrades, which you can find in `shared/shared.wxs`. |
+| BldAssertsUpgradeCode, CliUpgradeCode, DbgUpgradeCode, IdeUpgradeCode, RtlUpgradeCode, WindowsSDKUpgradeCode, AndroidSDKUpgradeCode | Upgrade codes for individual packages. Packages keep the same upgrade codes "forever" because MSI lets you specify version ranges for upgrades, which you can find in `shared/shared.wxs`. |
 | BundleUpgradeCode | Upgrade codes for the bundle. Bundles don't support upgrade version ranges, so the bundle upgrade code must change for every minor version _and_ stay the same for the entire lifetime of that minor version (e.g., v5.10.0 through v5.10.9999). You can keep the history of upgrade codes using a condition like `Condition="'$(MajorMinorProductVersion)' == '5.10'` or just replace BundleUpgradeCode when forking to a new minor version. |
 
 
diff --git a/platforms/Windows/shared/swift.en-us.wxl b/platforms/Windows/shared/swift.en-us.wxl
index 7b6517ea..1e6dae08 100644
--- a/platforms/Windows/shared/swift.en-us.wxl
+++ b/platforms/Windows/shared/swift.en-us.wxl
@@ -3,6 +3,7 @@
 <WixLocalization xmlns="http://wixtoolset.org/schemas/v4/wxl" Culture="en-US">
   <String Id="DowngradeError" Value="A newer version of [ProductName] is already installed." />
   <String Id="Bld_ProductName" Value="Swift Build Tools" />
+  <String Id="BldAsserts_ProductName" Value="Swift Build Tools (Asserts)" />
   <String Id="Cli_ProductName" Value="Swift Command Line Tools" />
   <String Id="Dbg_ProductName" Value="Swift Debugging Tools" />
   <String Id="Ide_ProductName" Value="Swift IDE Integration Tools" />