diff --git a/nimgen.nim b/nimgen.nim
index 14ece01..376e0eb 100644
--- a/nimgen.nim
+++ b/nimgen.nim
@@ -651,7 +651,7 @@ proc runCfg(cfg: string) =
     echo "Config doesn't exist: " & cfg
     quit(1)
 
-  gProjectDir = parentDir(cfg)
+  gProjectDir = parentDir(cfg.expandFilename())
 
   gConfig = loadConfig(cfg)