diff --git a/build.cake b/build.cake
index 32746aa6..549ec54d 100644
--- a/build.cake
+++ b/build.cake
@@ -220,14 +220,17 @@ Task("BuildTest")
         {
             var project = pair.Key;
             var projectFolder = System.IO.Path.Combine(testFolder, project);
-            var runLog = new List<string>();
-            Run(dotnetcli, $"build --framework {framework} --configuration {testConfiguration} \"{projectFolder}\"",
+            var logPath = System.IO.Path.Combine(logFolder, $"{project}-{framework}-build.log");
+            using (var logWriter = new StreamWriter(logPath)) {
+                Run(dotnetcli, $"build --framework {framework} --configuration {testConfiguration} \"{projectFolder}\"",
                     new RunOptions
                     {
-                        StandardOutputListing = runLog
+                        StandardOutputWriter = logWriter,
+                        StandardErrorWriter = logWriter
                     })
                 .ExceptionOnError($"Building test {project} failed for {framework}.");
-            System.IO.File.WriteAllLines(System.IO.Path.Combine(logFolder, $"{project}-{framework}-build.log"), runLog.ToArray());
+            }
+
         }
     }
 });
diff --git a/scripts/runhelpers.cake b/scripts/runhelpers.cake
index b6a194d6..37682fc8 100644
--- a/scripts/runhelpers.cake
+++ b/scripts/runhelpers.cake
@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 
 /// <summary>
 ///  Class encompassing the optional settings for running processes.
@@ -11,13 +12,13 @@ public class RunOptions
     /// </summary>
     public string WorkingDirectory { get; set; }
     /// <summary>
-    ///  Container logging the StandardOutput content.
+    ///  Stream to log std out messages to
     /// </summary>
-    public IList<string> StandardOutputListing { get; set; }
+    public StreamWriter StandardOutputWriter { get; set; }
     /// <summary>
-    ///  Container logging the Error content.
+    ///  Stream to log std err messages to
     /// </summary>
-    public IList<string> StandardErrorListing { get; set; }
+    public StreamWriter StandardErrorWriter { get; set; }
     /// <summary>
     ///  Desired maximum time-out for the process
     /// </summary>
@@ -121,27 +122,27 @@ ExitStatus Run(string exec, string args, RunOptions runOptions)
             {
                 WorkingDirectory = workingDirectory,
                 UseShellExecute = false,
-                RedirectStandardOutput = runOptions.StandardOutputListing != null,
-                RedirectStandardError = runOptions.StandardErrorListing != null,
+                RedirectStandardOutput = runOptions.StandardOutputWriter != null,
+                RedirectStandardError = runOptions.StandardErrorWriter != null,
             });
-    if (runOptions.StandardOutputListing != null)
+    if (runOptions.StandardOutputWriter != null)
     {
         process.OutputDataReceived += (s, e) =>
         {
             if (e.Data != null)
             {
-                runOptions.StandardOutputListing.Add(e.Data);
+                runOptions.StandardOutputWriter.WriteLine(e.Data);
             }
         };
         process.BeginOutputReadLine();
     }
-    if (runOptions.StandardErrorListing != null)
+    if (runOptions.StandardErrorWriter != null)
     {
         process.ErrorDataReceived += (s, e) =>
         {
             if (e.Data != null)
             {
-                runOptions.StandardErrorListing.Add(e.Data);
+                runOptions.StandardErrorWriter.WriteLine(e.Data);
             }
         };
         process.BeginErrorReadLine();
@@ -220,21 +221,16 @@ public void KillProcessTree(Process process)
 }
 
 public void DotnetPack(string outputFolder, string projectFolder, string project) {
-    var runLog = new List<string>();
-    var errorLog = new List<string>();
     var logPath = System.IO.Path.Combine(logFolder, $"{project}-pack.log");
-    Information($"Packaging {projectFolder}");
-    try {
+    using (var logWriter = new StreamWriter(logPath)) {
+        Information($"Packaging {projectFolder}");
         Run(dotnetcli, $"pack --configuration {configuration} --output {outputFolder} \"{projectFolder}\"",
             new RunOptions
             {
-                StandardOutputListing = runLog,
-                StandardErrorListing = errorLog
+                StandardOutputWriter = logWriter,
+                StandardErrorWriter = logWriter
             })
         .ExceptionOnError($"Packaging {project} failed. See {logPath} for details.");
-    } catch(Exception) {
-        System.IO.File.WriteAllLines(logPath, runLog.ToArray());
-        throw;
     }
-    System.IO.File.WriteAllLines(logPath, runLog.ToArray());
+
 }