I’m slightly confused what your aim is. The Unity CTL file is, as the name implies, a transform which does nothing. Open the file in a text editor, and you will see it says “Output is the same as input”.
To create a LUT which combines an IDT, the RRT and an ODT into one LUT, you need to apply a series of CTL files. I detail it in the original post – LUT's that emulate the ACES workflow
With the latest Resolve you can build a LUT easily using the OFX ACES Transform. You use a non ACES project, apply the ACES Transform effect and choose your input and output transforms from the drop-downs. Then export the grade as a LUT.
If you need to include full <> legal scaling (as described in my original post) before or after the transform before exporting the LUT, you can use the attached CDL files (they are CDL, but I had to change the extension to .ctl so ACES Central would allow me to upload them. You need to change it back.)
full_legal.ctl (398 Bytes)
legal_full.ctl (400 Bytes)