Hello, hope not an off-topic question here :

how to best setup / configure hblock on NixOS ?

 * https://raw.githubusercontent.com/hectorm/hmirror/master/data/ublock-abuse/list.txt
 * https://raw.githubusercontent.com/hectorm/hmirror/master/data/ublock-badware/list.txt
 * https://raw.githubusercontent.com/hectorm/hmirror/master/data/ublock-privacy/list.txt
 * https://raw.githubusercontent.com/hectorm/hmirror/master/data/urlhaus/list.txt
[INFO] Applying denylist
[INFO] Sanitizing blocklist
[INFO] Sorting blocklist
[INFO] Applying format template
[ERROR] Cannot write file: /etc/hosts
o***@3*** /etc [1]> ```
 
is the prompt I get, and the gnome hblocker extension does not function -- 

Thanks for aiding and advice...