diff --git a/app-arch/unalz/Manifest b/app-arch/unalz/Manifest
new file mode 100644
index 0000000000..c0a9924e3e
--- /dev/null
+++ b/app-arch/unalz/Manifest
@@ -0,0 +1,3 @@
+DIST unalz-0.65-use-system-bz2.patch.bz2 18820 BLAKE2B 7737efd16b9510b981dba46847c8ec9725adeb9a64a1df0473a37bb2aac9dc6fc10c6289c22e8b264d7c676633a1b0bea78922f2a3ec5ac39e0697d045117bef SHA512 4247a39258607bb5c58989c199b0914188c1d3d2ff5021f8c2aa4b5d9c04a1caeab1989fd069326c53073181e5cfdea286a6e750611b10ba421fa22b718c58c2
+DIST unalz-0.65-use-system-zlib.patch.bz2 57637 BLAKE2B eb647a7f8f89314a64d96a46908d17f89776e3e0837a7b483d3a425e0932f7fea4bb7aa7378628c3ce9abf6d91081756ead937696a1577612857fd4dba3d38f3 SHA512 8aa24822b36cf771cf12ae73b958b83bed83696624396cfa3e73dfc39e8f9c924fd6df3c3dd469269bc31845c044990dbb1f21b4f058c195d0eb4414c54621f5
+DIST unalz-0.65.tgz 137985 BLAKE2B d99ca69a46c45ac1e231fe394fbf7f5d4721e10838c8684c8b436f779e2e3286c7586ce345fe3548cc41931c904366f96fbb82fadd9a62faeefa862f924ffb4e SHA512 6e22d1e28c956ced5c9dbfd4d7b5c03f36a8bd3e076801984cc4539e579cefbb1a6001d1086b33e14843e9d5be37a6cf811acffb52bb5dfb5d4a65518b735600
diff --git a/app-arch/unalz/files/unalz-0.65-buildfix-wrong-data-type.patch b/app-arch/unalz/files/unalz-0.65-buildfix-wrong-data-type.patch
new file mode 100644
index 0000000000..5eec7f6901
--- /dev/null
+++ b/app-arch/unalz/files/unalz-0.65-buildfix-wrong-data-type.patch
@@ -0,0 +1,25 @@
+From 157d87e31f89805ab663aef861ebd3018cb37fca Mon Sep 17 00:00:00 2001
+From: King_DuckZ <king_duckz@gmx.com>
+Date: Tue, 5 May 2020 15:51:06 +0200
+Subject: [PATCH 1/3] Buildfix
+
+---
+ UnAlz.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/UnAlz.cpp b/UnAlz.cpp
+index 6ae3ef3..c8e3cc7 100644
+--- a/UnAlz.cpp
++++ b/UnAlz.cpp
+@@ -1907,7 +1907,7 @@ void CUnAlz::DecryptingData(int nSize, BYTE* data)
+ ////////////////////////////////////////////////////////////////////////////////////////////////////
+ UINT32 CUnAlz::CRC32(UINT32 l, BYTE c)
+ {
+-	const unsigned long *CRC_TABLE = get_crc_table();
++	const z_crc_t *CRC_TABLE = get_crc_table();
+ 	return CRC_TABLE[(l ^ c) & 0xff] ^ (l >> 8);
+ }
+ 
+-- 
+2.26.2
+
diff --git a/app-arch/unalz/metadata.xml b/app-arch/unalz/metadata.xml
new file mode 100644
index 0000000000..e06441c575
--- /dev/null
+++ b/app-arch/unalz/metadata.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="person">
+    <email>m.santullo@posteo.net</email>
+    <name>Michele Santullo</name>
+  </maintainer>
+</pkgmetadata>
diff --git a/app-arch/unalz/unalz-0.65.ebuild b/app-arch/unalz/unalz-0.65.ebuild
new file mode 100644
index 0000000000..dd4240383f
--- /dev/null
+++ b/app-arch/unalz/unalz-0.65.ebuild
@@ -0,0 +1,34 @@
+# Copyright 2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DESCRIPTION="Extract ALZ archives"
+HOMEPAGE="http://kippler.com/win/unalz/"
+SRC_URI="http://kippler.com/win/${PN}/${P}.tgz
+	https://alarmpi.no-ip.org/gentoo/${PN}-0.65-use-system-zlib.patch.bz2
+	https://alarmpi.no-ip.org/gentoo/${PN}-0.65-use-system-bz2.patch.bz2"
+
+LICENSE="ZLIB"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+DEPEND="app-arch/bzip2 sys-libs/zlib virtual/libiconv"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.65-buildfix-wrong-data-type.patch
+	"${WORKDIR}"/${PN}-0.65-use-system-zlib.patch
+	"${WORKDIR}"/${PN}-0.65-use-system-bz2.patch
+)
+
+S="${WORKDIR}"/${PN}
+
+src_compile() {
+	emake linux-utf8
+}
+
+src_install() {
+	dobin "${S}"/unalz
+}