diff --git a/quick_build.py b/quick_build.py
index 40c15ec..ca0a839 100644
--- a/quick_build.py
+++ b/quick_build.py
@@ -37,6 +37,15 @@ def clean_build():
         dirs_to_clean = ['dist']
         print("Incremental build mode - preserving build cache for faster builds")
     
+    # Always remove spec file to ensure PyInstaller regenerates it from command-line args
+    spec_file = 'MultiPlatformGUI.spec'
+    if os.path.exists(spec_file):
+        try:
+            os.remove(spec_file)
+            print(f"Removed old spec file: {spec_file}")
+        except Exception as e:
+            print(f"WARNING: Failed to remove spec file: {e}")
+    
     for dir_name in dirs_to_clean:
         print(f"Checking directory: {dir_name}")
         if os.path.exists(dir_name):