~$ mkluatexfontdb luaotfload | Updating the font names database: luaotfload | Scanning TEXMF fonts....../share/texmf-dist/tex/luatex/lualibs/lualibs-dir.lua:37: bad argument #1 to '(for generator)' (directory metatable expected, got nil) A fix can be found here: https://github.com/mpg/lualibs/commit/ebac0e8e8d5d57eec5dfd3a3217e7e2fc3fe9bbd#lualibs-dir.lua
More infos can be found here: http://tug.org/pipermail/tex-live/2011-January/028402.html
fixed in 2010-r1, thanks and sorry for the delay :( fixed the same in luatools so that context --make works too