gfLibraryPath is actually an environment variable not a file path. Use the current directory instead.

src/GF/Compile/MkConcrete.hs

@@ -68,7 +68,7 @@ mkCncGroups opts0 ((res,path),files) = do
   let opts = addOptions (options [beSilent,pathList path]) opts0
   let treebank = oElem (iOpt "treebank") opts
   resf <- useIOE res $ do
-    (fp,_) <- readFileLibraryIOE gfLibraryPath res
+    (fp,_) <- readFileLibraryIOE "" res
     return fp
   egr <- appIOE $ shellStateFromFiles opts emptyShellState resf
   (parser,morpho) <- if treebank then do