diff -Naur camlzip-1.04/Makefile camlzip-1.04.nixos/Makefile
--- camlzip-1.04/Makefile	2002-04-22 17:28:57.000000000 +0200
+++ camlzip-1.04.nixos/Makefile	2010-08-17 14:40:07.000000000 +0200
@@ -4,14 +4,14 @@
 ZLIB_LIB=-lz
 
 # The directory containing the Zlib library (libz.a or libz.so)
-ZLIB_LIBDIR=/usr/local/lib
+ZLIB_LIBDIR=@ZLIB_LIBDIR@
 
 # The directory containing the Zlib header file (zlib.h)
-ZLIB_INCLUDE=/usr/local/include
+ZLIB_INCLUDE=@ZLIB_INCLUDE@
 
 # Where to install the library.  By default: sub-directory 'zip' of
 # OCaml's standard library directory.
-INSTALLDIR=`$(OCAMLC) -where`/zip
+INSTALLDIR=@INSTALLDIR@
 
 ### End of configuration section
 
@@ -59,10 +59,6 @@
 	cp zip.cma zip.cmi gzip.cmi zip.mli gzip.mli libcamlzip.a $(INSTALLDIR)
 	if test -f dllcamlzip.so; then \
 	  cp dllcamlzip.so $(INSTALLDIR); \
-          ldconf=`$(OCAMLC) -where`/ld.conf; \
-          installdir=$(INSTALLDIR); \
-          if test `grep -s -c $$installdir'$$' $$ldconf || :` = 0; \
-          then echo $$installdir >> $$ldconf; fi \
         fi
 
 installopt: