diff --git a/unix/Make-config b/unix/Make-config
--- a/unix/Make-config
+++ b/unix/Make-config
@@ -18,7 +18,7 @@
 # Bourne Shell Configuration:
 #   set SHELL=/bin/sh or wherever your bourne shell is
 ##########################################################################
-SHELL=/bin/sh
+# SHELL=/bin/sh
 
 
 
@@ -30,7 +30,7 @@
 
 # The following line should be set to -Ixxx where xxx is your X11 include path
 # Sun puts X11 in /usr/openwin/xxx
-X11INC= -I/usr/openwin/include
+# X11INC= -I/usr/openwin/include
 
 # Others typically use /usr/X11 or /usr/X11R6
 #X11INC= -I/usr/X11
@@ -105,9 +105,9 @@
 ##########################################################################
 # Customize MPI directories and includes as-needed.
 # A typical MPICH installation location:
-MPIDIR=/usr/local/mpi
-MPIINC=$(MPIDIR)/include
-MPILIB=$(MPIDIR)/lib
+# MPIDIR=/usr/local/mpi
+# MPIINC=$(MPIDIR)/include
+# MPILIB=$(MPIDIR)/lib
 
 # MPI defines and any flags needed by the local installation.
 # Always list -DMPI at a minimum.  
@@ -166,9 +166,9 @@
 #   http://www.ijg.org/files/
 ##########################################################################
 # Uncomment the following lines to disable JPEG support
-USEJPEG=
-JPEGINC=
-JPEGLIB=
+# USEJPEG=
+# JPEGINC=
+# JPEGLIB=
 
 # Uncomment the following lines to enable JPEG support
 #USEJPEG= -DUSEJPEG
@@ -186,9 +186,9 @@
 #   http://www.libpng.org/
 ##########################################################################
 # Uncomment the following lines to disable PNG support
-USEPNG=
-PNGINC=
-PNGLIB=
+# USEPNG=
+# PNGINC=
+# PNGLIB=
 
 # Uncomment the following lines to enable PNG support
 #USEPNG= -DUSEPNG