From source

Sottomano builds with cargo on a nightly toolchain, which rustup picks up from rust-toolchain.toml in the checkout. The build headers it needs come from the distribution’s package manager: Ubuntu or Fedora.

git clone https://codeberg.org/wvhulle/sottomano && cd sottomano
eval "$(cargo xtask fetch-icon-svgs)"
cargo install --locked --path sottomano-shell

cargo xtask fetch-icon-svgs clones the three icon sets the icon crates embed SVGs from — phosphor, simple-icons and weather-icons — into ~/.cache/sottomano/icon-sets/, each at the revision the flake pins, and prints the PHOSPHOR_SVG, SIMPLE_ICONS_SVG and WEATHER_ICONS_SVG exports the build reads (a Nix build does this itself). The phosphor and simple-icons revisions come from flake.nix; the weather-icons version comes from the nixpkgs the flake pins, so that one needs nix eval --inputs-from ..

To compile in only your compositor, add --no-default-features --features niri,libvirt-domains (or sway, hyprland) to cargo install.

The widgets call distribution tools and D-Bus services when present and hide what they cannot read; sudo sottomano setup <distro> installs them, as the distribution pages show. The system pieces some widgets read need the same command’s system setup steps.