/etc/config.scm issues after modifying

[Patrick Pippen]

https://paste.debian.net/1327458

Getting this error: /etc/config.scm:23:0 :  error: %desktop-services:  invalid 
field specifier 

I made these modifications trying to 1) not use substitutes and compile from 
source and add bspwm so that I can login into it via the default login manager.

Is this not really correct way to do this or am I going about it the wrong way?
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