diff --git a/src/stdlib.make.in b/src/stdlib.make.in
index 8096535c2c..032ae337d7 100644
--- a/src/stdlib.make.in
+++ b/src/stdlib.make.in
@@ -1,7 +1,7 @@
 SHELL := /usr/bin/env bash -euo pipefail
 
 # any absolute path to the stdlib breaks the Makefile
-undefine LEAN_PATH
+# undefine LEAN_PATH
 
 # LEAN_OPTS: don't use native code (except for primitives) since it is from the previous stage
 # MORE_DEPS: rebuild the stdlib whenever the compiler has changed