Fixed relative dir path

Author: aborziak-ms

build/build.cake

@@ -244,10 +244,10 @@ Task("Package")
     // Invoke the pack target to generate the code to be packed.
     MSBuildSolution("Pack", ("GenerateLibraryLayout", "true"), ("PackageOutputPath", nupkgDir));
 
-    var stage   = Directory("./pack");
+    var stage   = Directory($"{baseDir}/pack/lib");
 
-    var net9Dir = stage + Directory("lib") + Directory("net9.0-windows10.0.26100.0");
-    var uapDir  = stage + Directory("lib") + Directory("uap10.0.16299");
+    var net9Dir = stage + Directory("net9.0-windows10.0.26100.0");
+    var uapDir  = stage + Directory("uap10.0.16299");
 
     // clean & recreate
     CleanDirectory(stage);