Update nix/shell.nix to include myProject as a build input

Author: matthid

nix/shell.nix

@@ -1,8 +1,11 @@
 { pkgs ? import <nixpkgs> {} }:
-
+let
+  myProject = import ./project.nix { pkgs = pkgs; };
+in
 pkgs.mkShell {
   buildInputs = [
     pkgs.python3
+    myProject
     pkgs.git
     pkgs.curl
   ];