In building blocks you basically never set the cell width directly, but possibly other parameters that may affect the cell width.
Okay so i get that.
Note that all interconnects do have a “width” keyword. Hence, if needed, adapt the interconnect to the building block pin width when connecting, e.g. with a “taper” or “ptaper”. See also here
But i dontget this. in my case above, how would i use this? i have to use the cell from demofab, not interconnects. Can you please show how could that work?