diff --git a/src/ClaudeDo.Installer/ClaudeDo.Installer.csproj b/src/ClaudeDo.Installer/ClaudeDo.Installer.csproj
index ddc212f..8854b1a 100644
--- a/src/ClaudeDo.Installer/ClaudeDo.Installer.csproj
+++ b/src/ClaudeDo.Installer/ClaudeDo.Installer.csproj
@@ -6,6 +6,8 @@
     <UseWPF>true</UseWPF>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <!-- Allow Linux Gitea runners to publish this WPF project for win-x64; no-op on Windows. -->
+    <EnableWindowsTargeting>true</EnableWindowsTargeting>
   </PropertyGroup>
 
   <!-- Debug: asInvoker so Rider/VS can debug without elevation -->
diff --git a/tests/ClaudeDo.Installer.Tests/ClaudeDo.Installer.Tests.csproj b/tests/ClaudeDo.Installer.Tests/ClaudeDo.Installer.Tests.csproj
index 3aef282..9a9b4eb 100644
--- a/tests/ClaudeDo.Installer.Tests/ClaudeDo.Installer.Tests.csproj
+++ b/tests/ClaudeDo.Installer.Tests/ClaudeDo.Installer.Tests.csproj
@@ -7,6 +7,8 @@
 
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
+    <!-- Allow Linux Gitea runners to build this Windows-targeted project; no-op on Windows. -->
+    <EnableWindowsTargeting>true</EnableWindowsTargeting>
   </PropertyGroup>
 
   <ItemGroup>