Помогите поставить nvidia-drivers-340.108

Здравствуйте. Делаю по handbook:

echo ">=x11-drivers/nvidia-drivers-341.0.0" > /etc/portage/package.mask/nvidia-drivers

добавляю в make.conf VIDEO_CARDS="nvidia"

localhost ~ # emerge --update --newuse --deep @world
Calculating dependencies... done!

!!! All ebuilds that could satisfy ">=x11-drivers/nvidia-drivers-390.25[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_riscv_lp64d(-)?,abi_riscv_lp64(-)?,abi_s390_32(-)?,abi_s390_64(-)?]" have been masked.
!!! One of the following masked packages is required to complete your request:
- x11-drivers/nvidia-drivers-440.82-r3::gentoo (masked by: package.mask, ~amd64 keyword)
- x11-drivers/nvidia-drivers-440.82-r1::gentoo (masked by: package.mask, ~amd64 keyword)
- x11-drivers/nvidia-drivers-440.82::gentoo (masked by: package.mask)
- x11-drivers/nvidia-drivers-435.21-r4::gentoo (masked by: package.mask, ~amd64 keyword)
- x11-drivers/nvidia-drivers-435.21-r2::gentoo (masked by: package.mask, ~amd64 keyword)
- x11-drivers/nvidia-drivers-435.21-r1::gentoo (masked by: package.mask)
- x11-drivers/nvidia-drivers-430.64-r4::gentoo (masked by: package.mask, ~amd64 keyword)
- x11-drivers/nvidia-drivers-430.64-r2::gentoo (masked by: package.mask, ~amd64 keyword)
- x11-drivers/nvidia-drivers-430.64-r1::gentoo (masked by: package.mask)
- x11-drivers/nvidia-drivers-390.132-r2::gentoo (masked by: package.mask, ~amd64 keyword)
- x11-drivers/nvidia-drivers-390.132-r1::gentoo (masked by: package.mask)

(dependency required by "media-libs/nv-codec-headers-9.0.18.1::gentoo" [ebuild])
(dependency required by "media-video/ffmpeg-4.2.2::gentoo[video_cards_nvidia]" [ebuild])
(dependency required by "www-client/firefox-68.8.0::gentoo" [installed])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.

пробовал отключать этот abi_x86_x32 через package.use, никакого эффекта. Как быть?