Index: build/cackey_win64_build/include/zconf.h
==================================================================
--- build/cackey_win64_build/include/zconf.h
+++ build/cackey_win64_build/include/zconf.h
@@ -409,11 +409,11 @@
    typedef Z_U4 z_crc_t;
 #else
    typedef unsigned long z_crc_t;
 #endif
 
-#ifdef HAVE_UNISTD_H    /* may be set to #if 1 by ./configure */
+#if 1    /* was set to #if 1 by ./configure */
 #  define Z_HAVE_UNISTD_H
 #endif
 
 #if 1    /* was set to #if 1 by ./configure */
 #  define Z_HAVE_STDARG_H

Index: build/cackey_win64_build/lib/libz.a
==================================================================
--- build/cackey_win64_build/lib/libz.a
+++ build/cackey_win64_build/lib/libz.a
cannot compute difference between binary files