Enable deterministic build.

Author: sharpjs

Directory.Build.props

@@ -35,14 +35,20 @@
     <Nullable>enable</Nullable>
     <InheritDocEnabled>true</InheritDocEnabled>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true'">
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+  </PropertyGroup>
 
   <!-- Packaging properties -->
   <PropertyGroup>
-    <GeneratePackageOnBuild Condition="'$(Configuration)' == 'Release'">true</GeneratePackageOnBuild>
     <PackageOutputPath>..\dist\</PackageOutputPath>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+  </PropertyGroup>
 
   <!-- Hide .root project output -->
   <PropertyGroup Condition="'$(MSBuildProjectName)' == '.root'">