diff --git a/build.proj b/build.proj
index 02ae75484..103a0f750 100644
--- a/build.proj
+++ b/build.proj
@@ -21,13 +21,14 @@
   <!-- dotnet msbuild -target:AllDocs build.proj -->
   <Target Name="AllDocs">
     <Exec Command='dotnet tool restore' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
-    <Exec Command='dotnet build FSharpPlus.sln -c Release' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
+    <!-- compile docs-project since that implies F#+ as well: -->
+    <Exec Command='dotnet build src/FSharpPlus.Docs -c Release' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
     <Exec Command='dotnet run -c Release --project ./docsrc/tools' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
   </Target>
 
   <Target Name="ReleaseDocs">
     <Exec Command='dotnet tool restore' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
-    <Exec Command='dotnet build FSharpPlus.sln -c Release' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
+    <Exec Command='dotnet build src/FSharpPlus -c Release' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
     <Exec Command='dotnet run -c Release --project ./docsrc/tools ReleaseDocs' WorkingDirectory="$(RepoRootDir)" IgnoreStandardErrorWarningFormat="true" />
   </Target>