--- /var/db/repos/gentoo/app-crypt/hashcat/hashcat-6.2.1-r1.ebuild	2021-05-29 10:09:32.000000000 +0300
+++ hashcat-6.2.1-r1.ebuild	2021-07-22 19:41:06.854040779 +0300
@@ -17,11 +17,12 @@
 	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
-	sys-libs/zlib[minizip]
+	system-zlib? ( sys-libs/zlib )
+	!system-zlib? ( sys-libs/zlib[minizip] )
 	brain? ( dev-libs/xxhash )
 	video_cards_nvidia? ( >x11-drivers/nvidia-drivers-440.64
 						|| ( dev-util/nvidia-cuda-toolkit
@@ -68,7 +69,7 @@
 		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}"