Search for makedepend in the PATH rather than hardcoding /usr/X11R6/bin
diff --git a/configs/linux-indirect b/configs/linux-indirect
index 93166e2..21546b6 100644
--- a/configs/linux-indirect
+++ b/configs/linux-indirect
@@ -10,7 +10,7 @@
 CC = gcc
 CXX = g++
 
-MKDEP = /usr/X11R6/bin/makedepend
+#MKDEP = /usr/X11R6/bin/makedepend
 #MKDEP = gcc -M
 #MKDEP_OPTIONS = -MF depend