{
  kicad,
  runCommand,

  nix-filter,

  panel,

  withTracks ? false,
  withZones ? false,
}: let
  zonesArg = if withZones then "--include-zones" else "";
  tracksArg = if withTracks then "--include-tracks" else "";

in runCommand "ocularium.model" {
  nativeBuildInputs = [
    kicad
  ];

  src = nix-filter {
    root = ./..;

    exclude = [
      "nix"
      ".gitignore"
      "flake.nix"
      "flake.lock"
      ".envrc"
      "kikit"
    ];
  };

  allowedRequisites = [];

  KICAD8_3DMODEL_DIR = "${kicad.libraries.packages3d}/share/kicad/3dmodels";
} ''
  set -e

  mkdir -p $out/share/npry/ocularium/model
  mkdir -p $out/share/npry/ocularium/panel/model

  export HOME=$(mktemp -d)

  cd $out/share/npry/ocularium/model

  kicad-cli pcb export step --subst-models --no-dnp ${tracksArg} ${zonesArg} $src/okm.kicad_pcb -o ocularium.step
  kicad-cli pcb export glb  --subst-models --no-dnp ${tracksArg} ${zonesArg} $src/okm.kicad_pcb -o ocularium.glb

  cd ../panel/model

  kicad-cli pcb export step --subst-models --no-dnp ${tracksArg} ${zonesArg} ${panel}/share/npry/ocularium/panel.kicad_pcb -o panel.step
  kicad-cli pcb export glb  --subst-models --no-dnp ${tracksArg} ${zonesArg} ${panel}/share/npry/ocularium/panel.kicad_pcb -o panel.glb
''