{
  kicad,
  runCommand,

  nix-filter,
  lib,

  src,
  sch_path,

  schName ? (lib.removeSuffix ".kicad_sch" (builtins.baseNameOf sch_path)),
}: let
  sharePath = "share/npry/clef/schematic";

in runCommand "${schName}.schematic" {
  nativeBuildInputs = [
    kicad
  ];

  src = nix-filter {
    root = src;

    include = [
      (nix-filter.matchExt "kicad_sch")
      (nix-filter.matchExt "kicad_pro")
      (nix-filter.matchExt "kicad_wks")

      (_args: path: type: type == "directory")
    ];
  };
} ''
  set -e
  export HOME=$(mktemp -d)

  echo "schematic: '${schName}'" >&2

  mkdir -p  "$out/${sharePath}/svg"
  cd        "$src"

  kicad-cli sch export pdf    -o "$out/${sharePath}/schematic.pdf"   $src/${sch_path}
  kicad-cli sch export svg -n -o "$out/${sharePath}/svg"             $src/${sch_path}

  cd "$out/${sharePath}/svg"

  # normalize
  for f in *.svg; do
    if [ "$f" = "${schName}.svg" ]; then
      mv -nv "$f" "root.svg"
      continue
    fi

    mv -nv "$f" "''${f#${schName}-}"
  done
''