Breakage due to b07581d6e24bf5fa4676bcebaba75315bbbb01e6

[Ricardo Wurmus]

Hi Pierre,

looks like your commit to upgrade sbcl broke thousands of builds:

   https://ci.guix.gnu.org/eval/69904?status=failed

I have two requests:

- Please revert the commit.
- Please push commits like this to a separate branch and have the 
 CI build the branch first.  Only then merge.

Thanks,

--
Ricardo