diff --git a/HISTORY.rst b/HISTORY.rst
index 193143d6..89ee0785 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -15,6 +15,8 @@ Release History
   (`issue #168 <https://github.com/platformio/platformio/issues/168>`_)
 * Disabled automatic updates by default for platforms, packages and libraries
   (`issue #171 <https://github.com/platformio/platformio/issues/171>`_)
+* Fixed bug with creating copies of source files
+  (`issue #177 <https://github.com/platformio/platformio/issues/177>`_)
 
 
 1.4.0 (2015-04-11)
diff --git a/platformio/__init__.py b/platformio/__init__.py
index c6851e7e..ffc095fc 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -1,7 +1,7 @@
 # Copyright (C) Ivan Kravets <me@ikravets.com>
 # See LICENSE for details.
 
-VERSION = (2, 0, "0.dev1")
+VERSION = (2, 0, "0.dev2")
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"
diff --git a/platformio/builder/tools/platformio.py b/platformio/builder/tools/platformio.py
index 8402e6e3..a45b526d 100644
--- a/platformio/builder/tools/platformio.py
+++ b/platformio/builder/tools/platformio.py
@@ -31,7 +31,7 @@ def BuildFirmware(env):
 
     firmenv = env.Clone()
     vdirs = firmenv.VariantDirRecursive(
-        join("$BUILD_DIR", "src"), "$PROJECTSRC_DIR")
+        join("$BUILD_DIR", "src"), "$PROJECTSRC_DIR", duplicate=False)
 
     # build dependent libs
     deplibs = firmenv.BuildDependentLibraries("$PROJECTSRC_DIR")
@@ -365,7 +365,7 @@ def ConvertInoToCpp(env):
     if not data:
         return
 
-    tmpcpp_file = join(env.subst("$PROJECTSRC_DIR"), "piomain.cpp")
+    tmpcpp_file = join(env.subst("$PROJECTSRC_DIR"), "tmp_ino_to.cpp")
     with open(tmpcpp_file, "w") as f:
         f.write(data)