In a large pot over medium heat, sauté the onion, celery, and garlic until soft and fragrant, about 5 minutes.
Add the chopped squash, carrots and chickpeas to the pot. Stir to combine.
Add the water, season with salt and pepper to taste, and bring the mixture to a boil.
Reduce the heat to low and let the soup simmer for 1.5 hours until the chickpeas are soft and the squash and carrots are tender.
Add two tablespoons of chicken soup mix and mix until dissolved.
Use an immersion blender or transfer the soup to a blender and puree until smooth.
Serve hot and garnish with chopped parsley or cilantro, if desired.