Hello,
> After some more discussion with Tobias on IRC, it seems that this was caused > by a `git pull` followed by a `make` and lacked a `make clean-go`. After > running > `make clean-go` and rebuilding, the problem went away. I can confirm this was caused by an API mismatch in gnu/system/install.scm after the kmscon-configuration record edit in the commit you spotted. Closing as removing the associated .go file fixes it. Thanks, Mathieu
