1 files changed, 18 insertions, 0 deletions
diff --git a/tex/context/base/l-dir.lua b/tex/context/base/l-dir.lua
index 71de3114e..3deb660ce 100644
--- a/tex/context/base/l-dir.lua
+++ b/tex/context/base/l-dir.lua
@@ -25,6 +25,24 @@ local isdir      = lfs.isdir
 local isfile     = lfs.isfile
 local currentdir = lfs.currentdir
 
+-- in case we load outside luatex
+
+if not isdir then
+    function isdir(name)
+        local a = attributes(name)
+        return a and a.mode == "directory"
+    end
+    lfs.isdir = isdir
+end
+
+if not isfile then
+    function isfile(name)
+        local a = attributes(name)
+        return a and a.mode == "file"
+    end
+    lfs.isfile = isfile
+end
+
 -- handy
 
 function dir.current()