mkspiffs ignoring custom flash layout about platform-espressif8266 HOT 5 CLOSED

pio platform show espressif8266

pio platform show espressif8266
espressif8266 ~ Espressif 8266
==============================
Espressif Systems is a privately held fabless semiconductor company. They provide wireless communications and Wi-Fi chips which are widely used in mobile devices and the Internet of Things applications.

Version: 1.1.1
Home: http://platformio.org/platforms/espressif8266
License: Apache-2.0
Frameworks: simba, arduino

Package toolchain-xtensa
------------------------
Type: toolchain
Requirements: ~1.40802.0
Installed: Yes
Description: xtensa-gcc
Url: https://github.com/jcmvbkbc/gcc-xtensa
Version: 1.40802.0

Package framework-simba
-----------------------
Type: framework
Requirements: >=7.0.0
Installed: No (optional)

Package tool-esptool
--------------------
Type: uploader
Requirements: ~1.409.0
Installed: Yes
Description: esptool-ck
Url: https://github.com/igrr/esptool-ck
Version: 1.409.0

Package tool-mkspiffs
---------------------
Type: uploader
Requirements: ~1.102.0
Installed: Yes
Description: Tool to build and unpack SPIFFS images
Url: https://github.com/igrr/mkspiffs
Version: 1.102.0

Package framework-arduinoespressif8266
--------------------------------------
Type: framework
Requirements: ~1.20300.1
Installed: Yes
Description: Arduino Wiring-based Framework (ESP8266 Core)
Url: https://github.com/esp8266/Arduino
Version: 1.20300.1

Package sdk-esp8266
-------------------
Requirements: ~1.10502.0
Installed: No (optional)