--- Makefile.PL.orig	2021-02-15 17:30:01.000000000 -0800
+++ Makefile.PL	2021-12-22 12:23:56.000000000 -0800
@@ -15,22 +15,22 @@
 # separated lists
 
 my %Arg = (
-	   # X11 library directories
-	   XDIR => '/usr/openwin/lib,/usr/X11/lib,/usr/X11R6/lib',
+           # X11 library directories
+           XDIR => '__PREFIX__/lib',
 
-	   # X11 libraries
-	   XLIB => 'X11',
+           # X11 libraries
+           XLIB => 'X11',
 
-	   # where cpgplot.h should be
-	   IDIR  => undef,
+           # where cpgplot.h should be
+           IDIR  => '__PREFIX__/include',
 
-	   # where libpgplot.a should be
-	   LDIR => undef,
-
-	   # extra libraries and directories
-	   EXLIB => join(',', grep check_lib(lib => $_), qw(png12 png16 z)),
-	   EXDIR => '/Applications/PDL/pgplot,/usr/local/lib',
-	  );
+           # where libpgplot.a should be
+           LDIR => '__PREFIX__/lib',
+
+           # extra libraries and directories
+           EXLIB => 'png,z', 
+           EXDIR => '__PREFIX__/lib',
+          );
 
 # Get user preferences
 my @NARGV;