CUPS package woes

[Alexander Shendi]

Dear guix-devel,
 
I have some problems with the CUPS package.  I have made some progress since I 
complained on #guix last night.
But I'm still not able to print files.
 
At first the CUPS-daemon cupsd refused to start. I was able to solve this:
- I created groups ("lpadmin" "sys" "system") in my OS-template.
 
Now I can start cupsd as root, but when using either the web interface or 
lpadmin to
administrate printers I get an error message:
"lpadmin: Request Entity Too Large"
 
Googling I realized that this was CUPS' way to tell me it could not write to 
the spool directory
or the log files.
Indeed I found the following lines in /var/log/messages.
 
May 26 05:26:13 localhost cupsd: Unable to change ownership of 
"/gnu/store/543kjj82rf610fgnjgp938f0h4wnf4i6-cups-2.0.1/var/log/cups" - 
Read-only file system
May 26 05:26:13 localhost cupsd: Unable to open log file 
"/gnu/store/543kjj82rf610fgnjgp938f0h4wnf4i6-cups-2.0.1/var/log/cups/error_log" 
- Read-only file system
 
Apparently cupsd tries to write to some location within the store, which is 
mounted
read-only.
 
So what do I do about this? THanks in advance for any suggestions/help.
 
Best Regards,
 
Alexander