diff --git a/scripts/dev.sh b/scripts/dev.sh
index 7c07425..7a70f39 100755
--- a/scripts/dev.sh
+++ b/scripts/dev.sh
@@ -7,14 +7,18 @@ install_packwiz() {
 
     # Move packwiz executable to a system directory (you may need sudo)
     sudo mv packwiz /usr/local/bin/packwiz
+    sudo chmod +x /usr/local/bin/packwiz
+    sudo chmod 111 /usr/local/bin/packwiz
 
     # Add packwiz to the system path
-    echo 'export PATH="$PATH:/usr/local/bin"' >> ~/.bashrc
-    source ~/.bashrc
+    if [[ ! ":$PATH:" == *":/usr/local/bin:"* ]]; then
+	    echo 'export PATH="$PATH:/usr/local/bin"' >> ~/.bashrc
+    fi
 
     # Generate autocompletion script
     packwiz completion bash > ~/.packwiz
     echo 'source ~/.packwiz' >> ~/.bashrc
+    source ~/.bashrc
 }
 
 # Function to create symlink for pre-commit hook
@@ -25,6 +29,9 @@ create_symlink() {
         exit 1
     fi
 
+    # Delete old symlink
+    rm -f "$(pwd)/.git/hooks/post-commit"
+
     # Create symlink for pre-commit hook
     ln -s "$(pwd)/scripts/hooks/post-commit" "$(pwd)/.git/hooks/post-commit"