--- a/ashcat-6.2.1-r1.ebuild	2021-05-29 10:09:32.000000000 +0300
+++ b/hashcat-6.2.1-r1.ebuild	2021-07-26 06:53:51.474203068 +0300
@@ -17,7 +17,7 @@
 	SRC_URI="https://github.com/hashcat/hashcat/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 fi
 
-IUSE="brain video_cards_nvidia"
+IUSE="brain video_cards_nvidia +system-zlib"
 DEPEND="
 	app-arch/lzma
 	app-arch/unrar
@@ -68,7 +68,7 @@
 		USE_SYSTEM_LZMA=0 \
 		USE_SYSTEM_OPENCL=1 \
 		USE_SYSTEM_UNRAR=0 \
-		USE_SYSTEM_ZLIB=1 \
+		USE_SYSTEM_ZLIB=$(usex system-zlib 1 0) \
 		USE_SYSTEM_XXHASH=1 \
 		VERSION_PURE="${PV}"
 
@@ -84,7 +84,7 @@
 			einfo "To run these tests, portage likely must be in the video group."
 			einfo "Please run \"gpasswd -a portage video\" if the tests will fail"
 		fi
-	#elif use vidia_cards_fglrx; then
+	#elif use video_cards_fglrx; then
 	#	addwrite /dev/ati
 	fi
 	#this always exits with 255 despite success
@@ -101,7 +101,7 @@
 		USE_SYSTEM_LZMA=0 \
 		USE_SYSTEM_OPENCL=1 \
 		USE_SYSTEM_UNRAR=1 \
-		USE_SYSTEM_ZLIB=1 \
+		USE_SYSTEM_ZLIB=$(usex system-zlib 1 0) \
 		USE_SYSTEM_XXHASH=1 \
 		VERSION_PURE="${PV}" \
 		install