diff --git a/archiver/zlib/zlib.conf b/archiver/zlib/zlib.conf
index 52c6d0196..f55e5e297 100644
--- a/archiver/zlib/zlib.conf
+++ b/archiver/zlib/zlib.conf
@@ -31,7 +31,5 @@ fi
 
 var_append AR " " "rc"
 
-var_append makeinstopt " " "prefix=$root/$prefix"
-var_append makeinstopt " " "libdir=$root/$libdir"
-var_append makeinstopt " " "includedir=$root/$includedir"
-var_append makeinstopt " " "mandir=$root/$mandir"
+var_append makeinstopt " " "prefix=/$prefix"
+var_append makeinstopt " " "mandir=$mandir"