diff --git a/bootstrap b/bootstrap
index 6c3d6ae2..d9430165 100755
--- a/bootstrap
+++ b/bootstrap
@@ -6,6 +6,9 @@ if [ "${BASH_VERSINFO[0]}" -lt 4 ]; then
     exit 1
 fi
 
+# see #849
+unset CDPATH
+
 ########################################
 # Common meta-language implementation. Syntax:
 #