diff --git a/src/dlangide.d b/src/dlangide.d
index f9bd162..cf9338d 100644
--- a/src/dlangide.d
+++ b/src/dlangide.d
@@ -39,7 +39,7 @@ extern (C) int UIAppMain(string[] args) {
     // open home screen tab
     frame.showHomeScreen();
     // for testing: load workspace at startup
-    //frame.loadWorkspace(appendPath(exePath, "../workspaces/sample1/sample1.dlangidews"));
+    frame.openFileOrWorkspace(appendPath(exePath, "../workspaces/sample1/sample1.dlangidews"));
 
     // show window
     window.show();
diff --git a/src/dlangide/builders/builder.d b/src/dlangide/builders/builder.d
index 470c891..a888610 100644
--- a/src/dlangide/builders/builder.d
+++ b/src/dlangide/builders/builder.d
@@ -1,10 +1,12 @@
 module dlangide.builders.builder;
 
+import dlangui.core.logger;
 import dlangide.workspace.project;
 import dlangide.ui.outputpanel;
 import dlangide.builders.extprocess;
 import dlangui.widgets.appframe;
 import std.algorithm;
+import core.thread;
 import std.string;
 import std.conv;
 
@@ -21,6 +23,7 @@ class Builder : BackgroundOperationWatcher, ProcessOutputTarget {
         _project = project;
         _log = log;
         _extprocess = new ExternalProcess();
+		Log.d("Builder.this");
     }
     /// log lines
     override void onText(dstring text) {
@@ -32,18 +35,20 @@ class Builder : BackgroundOperationWatcher, ProcessOutputTarget {
     override @property string icon() { return "folder"; }
     /// update background operation status
     override void update() {
-        if (_extprocess.state == ExternalProcessState.None) {
+		ExternalProcessState state = _extprocess.state;
+        if (state == ExternalProcessState.None) {
+			_log.clear();
             onText("Running dub\n"d);
-            _extprocess.run(cast(char[])"dub", cast(char[][])["build"], cast(char[])_project.dir, this, null);
-            if (_extprocess.state != ExternalProcessState.Running) {
-                onText("Failed to run builder tool");
+            state = _extprocess.run(cast(char[])"dub", cast(char[][])["build"], cast(char[])_project.dir, this, null);
+            if (state != ExternalProcessState.Running) {
+                onText("Failed to run builder tool\n");
                 _finished = true;
                 destroy(_extprocess);
                 _extprocess = null;
                 return;
             }
         }
-        ExternalProcessState state = _extprocess.poll();
+        state = _extprocess.poll();
         if (state == ExternalProcessState.Stopped) {
             onText("Builder finished with result "d ~ to!dstring(_extprocess.result) ~ "\n"d);
             _finished = true;
diff --git a/src/dlangide/builders/extprocess.d b/src/dlangide/builders/extprocess.d
index adbd616..54d517e 100644
--- a/src/dlangide/builders/extprocess.d
+++ b/src/dlangide/builders/extprocess.d
@@ -3,7 +3,7 @@ module dlangide.builders.extprocess;
 import dlangui.core.logger;
 
 import std.process;
-import std.file;
+import std.stdio;
 import std.utf;
 
 /// interface to forward process output to
@@ -52,8 +52,9 @@ class ExternalProcess {
         _args = args;
         _workDir = dir;
         _stdout = stdoutTarget;
-        _stdoutBuffer.clear();
-        _stderrBuffer.clear();
+        _stdoutBuffer = new Buffer();
+		if (stderrTarget)
+			_stderrBuffer = new Buffer();
         _result = 0;
         assert(_stdout);
         _stderr = stderrTarget;
@@ -62,12 +63,12 @@ class ExternalProcess {
         params ~= _program;
         params ~= _args;
         if (!_stderr)
-            redirect = Redirect.stdin | Redirect.stderrToStdout;
+            redirect = Redirect.stdout | Redirect.stdin | Redirect.stderrToStdout;
         else
             redirect = Redirect.all;
         Log.i("Trying to run program ", _program, " with args ", _args);
         try {
-            _pipes = pipeProcess(params, redirect, _env, Config.none, _workDir);
+            _pipes = pipeProcess(params, redirect, _env, Config.suppressConsole, _workDir);
             _state = ExternalProcessState.Running;
             _stdoutBuffer.init();
             if (_stderr)
@@ -100,7 +101,7 @@ class ExternalProcess {
             for(size_t i = 0; i < data.length; i++)
                 bytes[len++] = data[i];
         }
-        size_t read(std.file.File file) {
+        size_t read(std.stdio.File file) {
             size_t bytesRead = 0;
             for (;;) {
                 ubyte[] readData = file.rawRead(buffer);
@@ -169,7 +170,7 @@ class ExternalProcess {
     protected Buffer _stdoutBuffer;
     protected Buffer _stderrBuffer;
 
-    protected bool poll(ProcessOutputTarget dst, std.file.File src, ref Buffer buffer) {
+    protected bool poll(ProcessOutputTarget dst, std.stdio.File src, ref Buffer buffer) {
         if (src.isOpen) {
             buffer.read(src);
             dstring s = buffer.text;
@@ -188,12 +189,19 @@ class ExternalProcess {
             if (_stderr)
                 res = poll(_stderr, _pipes.stderr, _stderrBuffer) && res;
         } catch (Error e) {
-            Log.e("error occued while trying to poll streams for process ", _program);
+            Log.e("error occued while trying to poll streams for process ", _program, " : ", e);
             res = false;
         }
         return res;
     }
 
+	void closeFiles() {
+		_pipes.stdout.close();
+		_pipes.stdin.close();
+		if (_stderr)
+			_pipes.stderr.close();
+	}
+
     /// polls all available output from process streams
     ExternalProcessState poll() {
         bool res = true;
@@ -208,6 +216,7 @@ class ExternalProcess {
             if (pstate.terminated) {
                 pollStreams();
                 _state = ExternalProcessState.Stopped;
+				closeFiles();
                 _result = pstate.status;
             }
         } catch (Exception e) {
@@ -224,6 +233,8 @@ class ExternalProcess {
         try {
             _result = std.process.wait(_pipes.pid);
             _state = ExternalProcessState.Stopped;
+			pollStreams();
+			closeFiles();
         } catch (Exception e) {
             Log.e("Exception while waiting for process ", _program);
             _state = ExternalProcessState.Error;
diff --git a/src/dlangide/ui/outputpanel.d b/src/dlangide/ui/outputpanel.d
index 5e99610..b6fb531 100644
--- a/src/dlangide/ui/outputpanel.d
+++ b/src/dlangide/ui/outputpanel.d
@@ -23,4 +23,8 @@ class OutputPanel : DockWindow {
     void addLogLines(string category, dstring[] msg...) {
         _logWidget.appendLines(msg);
     }
+
+	void clear(string category = null) {
+		_logWidget.text = ""d;
+	}
 }