Preheat the oven to 325 degrees F. Line a 9x13 inch cake pan with parchment paper.
Roll out pie crust into pan. If you're using a homemade pie crust, try to roll it out into a 9x13 rectangle on a lightly floured surface. Press the pie crust into the bottom of the pan, folding sides where needed. Set aside.
Add the butter to a microwave-safe bowl. Melt in the microwave in 30 second increments.
Once the butter is completely melted, add in the flour, sugar, vanilla, and eggs and whisk until combined.
Stir in chocolate chips, pecans, and coconut flakes.
Pour the mixture over the pie crust in the prepared pan and spread evenly with an angled spatula.
Place in the preheated oven and bake for 39 - 44 minutes or until the pie is set. If it bakes too long, the top will crack.
Remove the pan from the oven and allow to cool completely, about 2 to 3 hours.
Onced cooled, remove the parchment paper from the pan and cut the bars into squares.