kicad: fix paths to 3d models (#424699)

          zip

        ];

      postInstall = lib.optional (name == "packages3d") ''

      postInstall =

        lib.optionalString (name == "packages3d") ''

          find $out -type f -name '*.step' | parallel 'stepreduce {} {} && zip -9 {.}.stpZ {} && rm {}'

        ''

        + lib.optionalString (name == "footprints") ''

          grep -rl '\.step' $out | xargs sed -i 's/\.step/.stpZ/g'

        '';

      meta = {