diff --git a/rapt/buildlib/rapt/build.py b/rapt/buildlib/rapt/build.py
index 7c6184f1..aeb031cb 100755
--- a/rapt/buildlib/rapt/build.py
+++ b/rapt/buildlib/rapt/build.py
@@ -628,7 +628,7 @@ def pack():
 
             dfn = plat.path(dfn)
 
-            shutil.copy(sfn, dfn)
+            shutil.move(sfn, dfn)
             files.append(dfn)
 
     # Launch.
@@ -651,6 +651,8 @@ def pack():
 
     if finished is not None:
         finished(files)
+        if os.path.isdir(assets):
+            shutil.rmtree(assets)
 
     iface.final_success(
         __("The build seems to have succeeded.") +