++ luarocks --verbose test
fs.current_dir()
fs.current_dir()
tree    nil                                       <<<-- these 2 lines are print() I've added to luarocks
cfg.root_dir    nil
/nix/store/dmsnsn318cpbzdx3c2cbp0bslhq5gfd8-lua-5.2.4/bin/lua: ...uarocks-local-3.3.1/share/lua/5.2/luarocks/core/path.lua:19: nil
stack traceback:
        [C]: in function 'assert'
        ...uarocks-local-3.3.1/share/lua/5.2/luarocks/core/path.lua:19: in function 'rocks_dir'
        ...8ci-luarocks-local-3.3.1/share/lua/5.2/luarocks/path.lua:218: in function 'use_tree'
        ...l8ci-luarocks-local-3.3.1/share/lua/5.2/luarocks/cmd.lua:110: in function 'process_tree_args'
        ...l8ci-luarocks-local-3.3.1/share/lua/5.2/luarocks/cmd.lua:584: in function 'run_command'
        ...3zvlfsmakl8ci-luarocks-local-3.3.1/bin/.luarocks-wrapped:38: in main chunk
        [C]: in ?
+ exitHandler
+ exitCode=1
+ set +e

local_cache = ""
-- To prevent collisions when creating environments, we install the rock
-- files into per-package subdirectories
rocks_subdir = 'argparse-0.7.0-1-rocks'
-- Then we need to tell luarocks where to find the rock files per
-- dependency
rocks_trees = {
  
}
-- For single-output external dependencies
external_deps_dirs = {
  '/nix/store/dmsnsn318cpbzdx3c2cbp0bslhq5gfd8-lua-5.2.4'
}
variables = {
  -- Some needed machinery to handle multiple-output external dependencies,
  -- as per https://github.com/luarocks/luarocks/issues/766
  
  
}