diff --git a/docs/technical/mod-package.md b/docs/technical/mod-package.md
index ca78be55..c483754e 100644
--- a/docs/technical/mod-package.md
+++ b/docs/technical/mod-package.md
@@ -414,6 +414,8 @@ when you compile it.
 ## Release notes
 ### Upcoming release
 * Switched to the newer crossplatform `portable` debug symbols (thanks to lanturnalis!).
+* Fixed `BundleExtraAssemblies` option being partly case-sensitive.
+* Fixed `BundleExtraAssemblies` not applying `All` value to game assemblies.
 
 ### 4.0.1
 Released 14 April 2022.
diff --git a/src/SMAPI.ModBuildConfig/build/smapi.targets b/src/SMAPI.ModBuildConfig/build/smapi.targets
index 12619439..b4fd312e 100644
--- a/src/SMAPI.ModBuildConfig/build/smapi.targets
+++ b/src/SMAPI.ModBuildConfig/build/smapi.targets
@@ -27,8 +27,12 @@
     <EnableGameDebugging Condition="'$(EnableGameDebugging)' == ''">true</EnableGameDebugging>
     <BundleExtraAssemblies Condition="'$(BundleExtraAssemblies)' == ''"></BundleExtraAssemblies>
 
+    <!-- simplify conditions -->
+    <_BundleExtraAssembliesForGame>$([System.Text.RegularExpressions.Regex]::IsMatch('$(BundleExtraAssemblies)', '\bGame|All\b', RegexOptions.IgnoreCase))</_BundleExtraAssembliesForGame>
+    <_BundleExtraAssembliesForAny>$([System.Text.RegularExpressions.Regex]::IsMatch('$(BundleExtraAssemblies)', '\bGame|System|ThirdParty|All\b', RegexOptions.IgnoreCase))</_BundleExtraAssembliesForAny>
+
     <!-- coppy referenced DLLs into build output -->
-    <CopyLocalLockFileAssemblies Condition="$(BundleExtraAssemblies.Contains('ThirdParty')) OR $(BundleExtraAssemblies.Contains('Game')) OR $(BundleExtraAssemblies.Contains('System')) OR $(BundleExtraAssemblies.Contains('All'))">true</CopyLocalLockFileAssemblies>
+    <CopyLocalLockFileAssemblies Condition="$(_BundleExtraAssembliesForAny)">true</CopyLocalLockFileAssemblies>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(OS)' == 'Windows_NT' AND '$(EnableGameDebugging)' == 'true'">
@@ -44,17 +48,17 @@
   **********************************************-->
   <ItemGroup>
     <!-- game -->
-    <Reference Include="Stardew Valley" HintPath="$(GamePath)\Stardew Valley.dll" Private="$(BundleExtraAssemblies.Contains('Game'))" />
-    <Reference Include="StardewValley.GameData" HintPath="$(GamePath)\StardewValley.GameData.dll" Private="$(BundleExtraAssemblies.Contains('Game'))" />
-    <Reference Include="MonoGame.Framework" HintPath="$(GamePath)\MonoGame.Framework.dll" Private="$(BundleExtraAssemblies.Contains('Game'))" />
-    <Reference Include="xTile" HintPath="$(GamePath)\xTile.dll" Private="$(BundleExtraAssemblies.Contains('Game'))" />
+    <Reference Include="Stardew Valley" HintPath="$(GamePath)\Stardew Valley.dll" Private="$(_BundleExtraAssembliesForGame)" />
+    <Reference Include="StardewValley.GameData" HintPath="$(GamePath)\StardewValley.GameData.dll" Private="$(_BundleExtraAssembliesForGame)" />
+    <Reference Include="MonoGame.Framework" HintPath="$(GamePath)\MonoGame.Framework.dll" Private="$(_BundleExtraAssembliesForGame)" />
+    <Reference Include="xTile" HintPath="$(GamePath)\xTile.dll" Private="$(_BundleExtraAssembliesForGame)" />
 
     <!-- SMAPI -->
-    <Reference Include="StardewModdingAPI" HintPath="$(GamePath)\StardewModdingAPI.dll" Private="$(BundleExtraAssemblies.Contains('Game'))" />
-    <Reference Include="SMAPI.Toolkit.CoreInterfaces" HintPath="$(GamePath)\smapi-internal\SMAPI.Toolkit.CoreInterfaces.dll" Private="$(BundleExtraAssemblies.Contains('Game'))" />
+    <Reference Include="StardewModdingAPI" HintPath="$(GamePath)\StardewModdingAPI.dll" Private="$(_BundleExtraAssembliesForGame)" />
+    <Reference Include="SMAPI.Toolkit.CoreInterfaces" HintPath="$(GamePath)\smapi-internal\SMAPI.Toolkit.CoreInterfaces.dll" Private="$(_BundleExtraAssembliesForGame)" />
 
     <!-- Harmony -->
-    <Reference Include="0Harmony" Condition="'$(EnableHarmony)' == 'true'" HintPath="$(GamePath)\smapi-internal\0Harmony.dll" Private="$(BundleExtraAssemblies.Contains('Game'))" />
+    <Reference Include="0Harmony" Condition="'$(EnableHarmony)' == 'true'" HintPath="$(GamePath)\smapi-internal\0Harmony.dll" Private="$(_BundleExtraAssembliesForGame)" />
   </ItemGroup>