diff --git a/src/Ymir.Core/Ymir.Core.csproj b/src/Ymir.Core/Ymir.Core.csproj
index 8b42b09..02139b9 100644
--- a/src/Ymir.Core/Ymir.Core.csproj
+++ b/src/Ymir.Core/Ymir.Core.csproj
@@ -1,8 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <PropertyGroup>
+    <CultLibRoot Condition="'$(CultLibRoot)' == ''">$(MSBuildThisFileDirectory)..\..\..\CultLib</CultLibRoot>
+  </PropertyGroup>
+
   <ItemGroup>
-    <ProjectReference Include="..\..\..\CultLib\src\GameCult.Caching\GameCult.Caching.csproj" />
-    <ProjectReference Include="..\..\..\CultLib\src\GameCult.Caching.MessagePack\GameCult.Caching.MessagePack.csproj" />
+    <ProjectReference Include="$(CultLibRoot)\src\GameCult.Caching\GameCult.Caching.csproj" />
+    <ProjectReference Include="$(CultLibRoot)\src\GameCult.Caching.MessagePack\GameCult.Caching.MessagePack.csproj" />
     <ProjectReference Include="..\..\..\CultMath\src\CultMath\CultMath.csproj" />
   </ItemGroup>