Global USE flags

Flag Description Packages
X Enable X11 sandboxing 2
apparmor Enable support for custom AppArmor profiles 2
cuda 2
debug 2
examples Build the bundled example programs 2
libnotify Announce volume changes as desktop notifications via <pkg>x11-libs/libnotify</pkg> (--notify) 2
test 2
wayland Add residual Computer Use fallbacks for Wayland sessions without a bundled bridge: <pkg>x11-misc/ydotool</pkg> for exotic compositors (requires ydotoold daemon running) and <pkg>media-gfx/imagemagick</pkg> for KDE below Plasma 6.6 2
webkit Enable the embedded web views (Prusa Connect, Printables, Prusa Account login) via <pkg>net-libs/webkit-gtk</pkg> 2

Category USE flags

app-misc

Flag Description Packages
cowork Pull in <pkg>app-emulation/qemu</pkg> and <pkg>app-emulation/virtiofsd</pkg> so Claude Desktop's Cowork feature can boot its sandbox microVM 2

Local USE flags

app-misc

claude-desktop-official

Flag Description
claude-code Pull in <pkg>dev-util/claude-code</pkg> so the bundled Claude Code integration can spawn the CLI

greenboost

Flag Description
abi_x86_32
bpf Build the optional eBPF tracer for tier migration events (needs a kernel with CONFIG_DEBUG_INFO_BTF)

dev-util

claude-code

Flag Description
cpu_flags_x86_avx
cpu_flags_x86_avx2

nvidia-cuda-toolkit

Flag Description
clang Depend on <pkg>llvm-core/clang</pkg> as host compiler
cuda-minor-compat Enforce the minimum compatible <pkg>x11-drivers/nvidia-drivers</pkg> version, as described in: https://docs.nvidia.com/cuda/cuda-toolkit-release-notes/index.html#cuda-driver
debugger Install the CUDA debugger
nsight Install profiling and optimizing tools (nsight-compute, nsight-systems)
profiler Install the NVIDIA CUDA profiler (nvprof) and the related libraries
rdma Enable infiniband support via <pkg>sys-cluster/rdma-core</pkg>
sanitizer Install compute-sanitizer tool

media-gfx

blender-bin

Flag Description
hip
oneapi Add support for OneAPI

sci-misc

llama-cpp

Flag Description
blis Build a BLIS backend
flexiblas Build a FlexiBLAS backend
openblas Build an OpenBLAS backend
opencl Build an OpenCL backend, so far only works on Adreno and Intel GPUs
openmp
openssl Use openssl to support HTTPS
rocm Build a HIP (ROCm) backend
vulkan
wmma Use rocWMMA to enhance flash attention performance

sys-apps

firejail

Flag Description
chroot Enable chrooting to custom directory
contrib Install contrib scripts
dbusproxy Enable DBus proxying to filter access in supporting profiles
file-transfer Enable file transfers between sandboxes and the host system
globalcfg Enable global config file
network Enable networking features
private-home Enable private home feature
selinux
userns Enable attaching a new user namespace to a sandbox (--noroot option)

x11-libs

wxGTK

Flag Description
curl
doc
gstreamer Enable the wxMediaCtrl class for playing audio and video through gstreamer.
keyring
lzma
opengl
pch
sdl Use Simple Directmedia Layer (<pkg>media-libs/libsdl2</pkg>) for audio.
spell
tiff

x11-misc

alock

Flag Description
imlib
pam
xbacklight Enable xbacklight support