Make a requisition field read-only

Summary:

I need to make a DFF read-only depending on the value of another DFF, on job requisitions.
I am using page composer for this, and I built the following EL expression:
#{bindings.****_ATTRIBUTE1.inputValue == 'Sales'} || #{bindings.****_ATTRIBUTE1.inputValue == 'General Administration'} || #{bindings.****_ATTRIBUTE1.inputValue == 'Marketing'}

So the field should only be available when the DFF value is "Build". However, the field is always available.

Does anyone know how the EL expression should be set?