use "load-file-name" instead of "symbol-file"
tree5521a86d6b54f02698394d03406c4152ea93861f
-rw-r--r-- 22938 eproject-config.el
-rw-r--r-- 1457 eproject.cfg
-rw-r--r-- 31886 eproject.el
-rw-r--r-- 4284 eproject.txt