diff --git a/x11-libs/pixman/pixman-0.46.0.ebuild b/x11-libs/pixman/pixman-0.46.0.ebuild
index fa5ecac0c222a..8cac0712d62c4 100644
--- a/x11-libs/pixman/pixman-0.46.0.ebuild
+++ b/x11-libs/pixman/pixman-0.46.0.ebuild
@@ -9,7 +9,7 @@ if [[ ${PV} = 9999* ]]; then
 	GIT_ECLASS="git-r3"
 fi
 
-inherit ${GIT_ECLASS} meson-multilib multiprocessing toolchain-funcs
+inherit flag-o-matic ${GIT_ECLASS} meson-multilib multiprocessing toolchain-funcs
 
 DESCRIPTION="Low-level pixel manipulation routines"
 HOMEPAGE="http://www.pixman.org/ https://gitlab.freedesktop.org/pixman/pixman/"
@@ -32,6 +32,13 @@ pkg_setup() {
 }
 
 multilib_src_configure() {
+	# Temporary workaround for a build failure (known gcc issue):
+	#
+	#  * https://bugs.gentoo.org/956715
+	#  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110812
+	#
+	use riscv && filter-lto
+
 	local emesonargs=(
 		$(meson_feature cpu_flags_x86_mmxext mmx)
 		$(meson_feature cpu_flags_x86_sse2 sse2)
diff --git a/x11-libs/pixman/pixman-9999.ebuild b/x11-libs/pixman/pixman-9999.ebuild
index fa5ecac0c222a..8cac0712d62c4 100644
--- a/x11-libs/pixman/pixman-9999.ebuild
+++ b/x11-libs/pixman/pixman-9999.ebuild
@@ -9,7 +9,7 @@ if [[ ${PV} = 9999* ]]; then
 	GIT_ECLASS="git-r3"
 fi
 
-inherit ${GIT_ECLASS} meson-multilib multiprocessing toolchain-funcs
+inherit flag-o-matic ${GIT_ECLASS} meson-multilib multiprocessing toolchain-funcs
 
 DESCRIPTION="Low-level pixel manipulation routines"
 HOMEPAGE="http://www.pixman.org/ https://gitlab.freedesktop.org/pixman/pixman/"
@@ -32,6 +32,13 @@ pkg_setup() {
 }
 
 multilib_src_configure() {
+	# Temporary workaround for a build failure (known gcc issue):
+	#
+	#  * https://bugs.gentoo.org/956715
+	#  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110812
+	#
+	use riscv && filter-lto
+
 	local emesonargs=(
 		$(meson_feature cpu_flags_x86_mmxext mmx)
 		$(meson_feature cpu_flags_x86_sse2 sse2)