Pixl.js SDA and SCL seems to be pointing to the wrong pins

I was trying out the i2cdetect script by @MaBe by using: I2C1.setup({sda: SDA, scl: SCL}) and I was wondering why none of my I2C devices were being detected when I used the very same Pixl.js to develop the INA219 module.

Then I copied the example code I used for that module which had this setup: I2C1.setup({ sda: A4, scl: A5 });

I thought the SCL and SDA constants were pointing to the wrong pins, and it looks like they are:

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|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v06 (c) 2019 G.Williams
>process.env
={
  VERSION: "2v06",
  GIT_COMMIT: "21168a2b",
  BOARD: "PIXLJS",
  FLASH: 524288, STORAGE: 36864, RAM: 65536,
  SERIAL: "e29d7f50-21853912",
  CONSOLE: "Bluetooth",
  MODULES: "Flash,Storage,hea" ... "el,graphical_menu",
  EXPTR: 536882640 }
>SDA
=D4
>SCL
=D5

D4 and D5 on the Pixl.js are digital pins.