media-libs/libaacs: force bison+flex

See upstream MR but it's very much not compatible with the POSIX variants.

Closes: https://bugs.gentoo.org/887071
Signed-off-by: Sam James <sam@gentoo.org>

media-libs/libaacs/libaacs-0.11.1-r1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2023 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -13,15 +13,24 @@ LICENSE="LGPL-2.1"
 SLOT="0"
 KEYWORDS="amd64 arm arm64 ~loong ppc ppc64 ~riscv sparc x86"
 
-RDEPEND=">=dev-libs/libgcrypt-1.5.3:0=[${MULTILIB_USEDEP}]
-	>=dev-libs/libgpg-error-1.12[${MULTILIB_USEDEP}]"
+RDEPEND="
+	>=dev-libs/libgcrypt-1.5.3:0=[${MULTILIB_USEDEP}]
+	>=dev-libs/libgpg-error-1.12[${MULTILIB_USEDEP}]
+"
 DEPEND="${RDEPEND}"
-BDEPEND="sys-devel/flex
-	app-alternatives/yacc"
+BDEPEND="
+	sys-devel/bison
+	sys-devel/flex
+"
 
 DOCS=( ChangeLog KEYDB.cfg README.md )
 
 multilib_src_configure() {
+	# Force Bison & flex as it doesn't work even w/ build system fixed
+	# https://code.videolan.org/videolan/libaacs/-/merge_requests/14
+	unset YACC
+	export LEX=flex
+
 	local myeconfargs=(
 		--disable-optimizations
 		--enable-shared