Can't start with --fennel flag

Installed via luarocks, executable seems to be working, but it doesn't work with --fennel flag.

~/.luarocks/bin/jeejah --fennel --debug

/usr/local/opt/lua/bin/lua5.3: ...uarocks/lib/luarocks/rocks-5.3/jeejah/0.3.0-2/bin/jeejah:12: bad argument #1 to 'insert' (table expected, got nil)
stack traceback:
	[C]: in function 'table.insert'
	...uarocks/lib/luarocks/rocks-5.3/jeejah/0.3.0-2/bin/jeejah:12: in main chunk
	[C]: in ?

Fennel version 0.3.1-1