Error When Compiling Aseprite on Mac Catalina

After following a tutorial about compiling Aseprite on Mac (https://needoneapp.medium.com/create-an-auto-build-script-for-aseprite-on-mac-os-af8288b34f05) I get to the final part and I get this message:

– Configuring incomplete, errors occurred!
See also “/Users/myusername/aseprite/build/CMakeFiles/CMakeOutput.log”.
See also “/Users/myusername/aseprite/build/CMakeFiles/CMakeError.log”.
ninja: error: loading ‘build.ninja’: No such file or directory

I have the latest version of Xcode and Xcode command line installed as well as all of the dependencies installed (Cmake, Ninja, and Skia) but I still get that error. If anyone has another tutorial on compiling Aseprite on Mac Catalina or a fix to this error, that would be great!