diff --git a/install_merlin_worker.sh b/install_merlin_worker.sh
index 40ecb74..78afb59 100644
--- a/install_merlin_worker.sh
+++ b/install_merlin_worker.sh
@@ -1,6 +1,13 @@
 #!/bin/bash
 
-curl -s https://git.miomio.moe/mio/easyzsh/raw/branch/master/patch.sh | bash -s merlin_worker
+# Exit on any error
+set -e
+
+# Download and execute the patch script
+if ! curl -s https://git.miomio.moe/mio/easyzsh/raw/branch/master/patch.sh | bash -s merlin_worker; then
+    echo "Error: Failed to download or execute patch script"
+    exit 1
+fi
 
 # Check if ~/.bashrc exists and contains PYTHONPATH export
 if [ -f "$HOME/.bashrc" ]; then
@@ -13,20 +20,27 @@ if [ -f "$HOME/.bashrc" ]; then
         # Path to the merlin_worker.zsh file
         MERLIN_CONFIG="$HOME/.config/zshrc/merlin_worker.zsh"
         
+        # Create directory if it doesn't exist
+        mkdir -p "$(dirname "$MERLIN_CONFIG")"
+        
         if [ -f "$MERLIN_CONFIG" ]; then
-            # Create a backup
-            cp "$MERLIN_CONFIG" "$MERLIN_CONFIG.backup"
-            
-            # Replace the last PYTHONPATH line in merlin_worker.zsh with the one from ~/.bashrc
-            # First, remove existing PYTHONPATH lines
-            sed -i '/^export PYTHONPATH=/d' "$MERLIN_CONFIG"
+            # Cross-platform sed: remove existing PYTHONPATH lines
+            if [[ "$OSTYPE" == "darwin"* ]]; then
+                # macOS
+                sed -i '' '/^export PYTHONPATH=/d' "$MERLIN_CONFIG"
+            else
+                # Linux/Ubuntu and others
+                sed -i '/^export PYTHONPATH=/d' "$MERLIN_CONFIG"
+            fi
             
             # Then append the PYTHONPATH from ~/.bashrc
             echo "$BASHRC_PYTHONPATH" >> "$MERLIN_CONFIG"
             
             echo "Updated PYTHONPATH in $MERLIN_CONFIG with value from ~/.bashrc"
         else
-            echo "Warning: $MERLIN_CONFIG not found"
+            # Create the file with just the PYTHONPATH
+            echo "$BASHRC_PYTHONPATH" > "$MERLIN_CONFIG"
+            echo "Created $MERLIN_CONFIG with PYTHONPATH from ~/.bashrc"
         fi
     else
         echo "No PYTHONPATH export found in ~/.bashrc"