Lmod not working in Rocky 8

LMOD is complaining about code in SitePackage.lua where we added the pid for lmod module tracking.

$ ml av
/usr/bin/lua: /share/apps/rc/modules/SitePackage.lua:6: attempt to index a nil value (field 'unistd')
stack traceback:
	/share/apps/rc/modules/SitePackage.lua:6: in main chunk
	[C]: in function 'require'
	/usr/share/lmod/lmod/libexec/lmod:364: in function 'main'
	/usr/share/lmod/lmod/libexec/lmod:551: in main chunk