## Function: SB-EXT:SET-SBCL-SOURCE-LOCATION
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> Initialize the SYS logical host based on PATHNAME, which should be
> the top-level directory of the SBCL sources. This will replace any
> existing translations for "SYS:SRC;", "SYS:CONTRIB;", and
> "SYS:OUTPUT;". Other "SYS:" translations are preserved.

### Lambda list
```cl
(pathname)
```