diff --git a/unzip-6.0-crc-builtin.patch b/unzip-6.0-crc-builtin.patch
new file mode 100644
index 0000000..c43cf29
--- /dev/null
+++ b/unzip-6.0-crc-builtin.patch
@@ -0,0 +1,122 @@
+diff -Nabur unzip60/crc32.c unzip604/crc32.c
+--- unzip60/crc32.c	2007-01-22 13:34:38.000000000 +0800
++++ unzip604/crc32.c	2021-05-12 15:08:34.409893493 +0800
+@@ -675,7 +675,32 @@
+ 
+ #endif /* (IZ_CRC_BE_OPTIMIZ || IZ_CRC_LE_OPTIMIZ) */
+ 
++#ifdef ARCH_AARCH64
++u_int32_t crc32(u_int32_t crc,const u_int8_t *p, unsigned int len)
++{
++int64_t length = len;
++
++while ((length -= sizeof(u_int64_t)) >=0) {
++        __builtin_aarch64_crc32cx(crc, *((u_int64_t *)p));
++        p += sizeof(u_int64_t);
++}
+ 
++if (length & sizeof(u_int32_t)) {
++        __builtin_aarch64_crc32cw(crc, *((u_int32_t *)p));
++        p += sizeof(u_int32_t);
++}
++
++if (length & sizeof(u_int16_t)) {
++        __builtin_aarch64_crc32ch(crc, *((u_int16_t *)p));
++        p += sizeof(u_int16_t);
++}
++
++if (length & sizeof(u_int8_t))
++        __builtin_aarch64_crc32cb(crc, *p);
++
++return crc;
++}
++#else
+ /* ========================================================================= */
+ ulg crc32(crc, buf, len)
+     ulg crc;                    /* crc shift register */
+@@ -726,6 +751,9 @@
+ 
+   return REV_BE(c) ^ 0xffffffffL;   /* (instead of ~c for 64-bit machines) */
+ }
++
++#endif /* !ARCH_AARCH64*/
++
+ #endif /* !ASM_CRC */
+ #endif /* !CRC_TABLE_ONLY */
+ #endif /* !USE_ZLIB */
+diff -Nabur unzip60/crc32.h unzip604/crc32.h
+--- unzip60/crc32.h	2008-03-09 02:40:20.000000000 +0800
++++ unzip604/crc32.h	2021-05-12 15:08:34.409893493 +0800
+@@ -36,7 +36,11 @@
+ #    undef IZ_CRC_BE_OPTIMIZ
+ #  endif
+ #else /* !(USE_ZLIB || CRC_TABLE_ONLY) */
++#  ifdef ARCH_AARCH64
++  u_int32_t crc32(u_int32_t crc,const u_int8_t *p, unsigned int len);
++#  else
+    ulg      crc32           OF((ulg crc, ZCONST uch *buf, extent len));
++#  endif 
+ #endif /* ?(USE_ZLIB || CRC_TABLE_ONLY) */
+ 
+ #ifndef CRC_32_TAB
+diff -Nabur unzip60/unix/Makefile unzip604/unix/Makefile
+--- unzip60/unix/Makefile	2009-01-19 06:41:18.000000000 +0800
++++ unzip604/unix/Makefile	2021-05-12 15:09:05.698385219 +0800
+@@ -40,7 +40,8 @@
+ 
+ # Defaults most systems use (use LOCAL_UNZIP in environment to add flags,
+ # such as -DDOSWILD).
+-
++TARGET_ARCH = $(shell uname -m)
++ARCH = $(shell getconf LONG_BIT)
+ # UnZip flags
+ CC = cc#	try using "gcc" target rather than changing this (CC and LD
+ LD = $(CC)#	must match, else "unresolved symbol:  ___main" is possible)
+@@ -54,6 +55,12 @@
+ LF = -o unzip$E $(LFLAGS1)
+ LF2 = -s
+ 
++ifeq ($(TARGET_ARCH),aarch64)
++CFF = -DARCH=$(ARCH) -march=armv8.1-a -D ARCH_AARCH64
++else
++CFF =
++endif
++
+ # UnZipSFX flags
+ SL = -o unzipsfx$E $(LFLAGS1)
+ SL2 = $(LF2)
+@@ -77,6 +84,8 @@
+ SHELL = /bin/sh
+ MAKEF = -f unix/Makefile
+ 
++
++
+ # Version info for unix/unix.c
+ HOST_VERSINFO=-DIZ_CC_NAME='\"\$$(CC) \"' -DIZ_OS_NAME='\"`uname -a`\"'
+ 
+@@ -231,13 +240,13 @@
+ # yes, we should be able to use the $O macro to combine these two, but it
+ # fails on some brain-damaged makes (e.g., AIX's)...no big deal
+ .c.o:
+-	$(CC) -c $(CF) $*.c
++	$(CC) -c $(CF) $(CFF)  $*.c
+ 
+ .c.obj:
+-	$(CC) -c $(CF) $*.c
++	$(CC) -c $(CF) $(CFF)  $*.c
+ 
+ .c.pic.o:
+-	$(CC) -c $(CF) -o $@ $*.c
++	$(CC) -c $(CF) $(CFF)  -o $@ $*.c
+ 
+ # this doesn't work...directories are always a pain with implicit rules
+ #.1.txt:		man/$<
+@@ -329,7 +338,7 @@
+ 	$(CC) -c $(CF) -DSFX -o $@ unzip.c
+ 
+ crc32_$O:	crc32.c $(UNZIP_H) zip.h crc32.h
+-	$(CC) -c $(CF) -DSFX -o $@ crc32.c
++	$(CC) -c $(CF) -DSFX $(CFF)  -o $@ crc32.c
+ 
+ crypt_$O:	crypt.c $(UNZIP_H) zip.h crypt.h crc32.h ttyio.h
+ 	$(CC) -c $(CF) -DSFX -o $@ crypt.c