Don't expand packages when caching Coherence (temporary).

makefile.shade

@@ -258,18 +258,19 @@ var buildTarget = "compile"
                 Directory.CreateDirectory(coherenceCacheDir);
 
                 Log.Info("Caching Coherence build " + latestBuild + " at " + coherenceCacheDir);
-                NuGetPackagesAdd(sourcePackagesDir: latestBuildShare, targetPackagesDir: coherenceCacheDir);
+                CopyFolder(latestBuildShare, coherenceCacheDir, overwrite: true);
 
-                Log.Info("Copying Universe commits file");
-                File.Copy(Path.Combine(coherenceShare, latestBuild, UniverseCommitsFileName), Path.Combine(coherenceCacheDir, UniverseCommitsFileName));
+                var universeCommitsFileTarget = Path.Combine(coherenceCacheDir, UniverseCommitsFileName);
+                Log.Info("Copying Universe commits file to " + universeCommitsFileTarget);
+                File.Copy(Path.Combine(coherenceShare, latestBuild, UniverseCommitsFileName), universeCommitsFileTarget);
 
                 Log.Info("Saving cached Coherence build version");
                 File.WriteAllText(coherenceVersionFilePath, latestBuild);
             }
 
             Environment.SetEnvironmentVariable("NUGET_VOLATILE_FEED_ASPNETVNEXT", coherenceCacheDir);
             Environment.SetEnvironmentVariable("NUGET_VOLATILE_FEED_EXTERNAL", Path.Combine(dropsShare, "latest-packages", "external", buildBranch));
-            Environment.SetEnvironmentVariable("UNIVERSE_COMMITS_FILE", Path.Combine(coherenceCacheDir, "commits-universe"));
+            Environment.SetEnvironmentVariable("UNIVERSE_COMMITS_FILE", universeCommitsFileTarget));
         }
     }