final updates

install_scripts.py

@@ -46,12 +46,14 @@ def ensure_bin_in_path(bin_path):
             path_file  = open(os.path.join(os.path.expanduser("~"), ".zshrc"), 'a')
         elif current_shell == 'bash':
             path_file  = open(os.path.join(os.path.expanduser("~"), ".bashrc"), 'a')
+        else:
+            path_file = None
 
         print(f"Appending {bin_path} to system' PATH.")
 
-        path_file.write(f"export PATH=$PATH:{bin_path}")
+        if path_file:
+            path_file.write(f"export PATH=$PATH:{bin_path}\n")
 
-        sys.path.append(bin_path)
         print(f"Added {bin_path} to the system path.")
 
 def main():