Can't build

[1ron-pon3]

Hi! I am trying to build this project and geting this error. Maybe someone can help to find out how to fix this?

Traceback (most recent call last):
  File "D:\Desktop\mp3_decode-master\esptool.py", line 22, in <module>
    import serial
ImportError: No module named serial
../Makefile:116: recipe for target '.output/eagle/bin/eagle.app.v6.bin' failed
mingw32-make[1]: *** [.output/eagle/bin/eagle.app.v6.bin] Error 1
mingw32-make[1]: Leaving directory 'D:/Desktop/mp3_decode-master/app'
D:/Desktop/mp3_decode-master/Makefile:142: recipe for target '.subdirs' failed
mingw32-make.exe: *** [.subdirs] Error 2

[1ron-pon3]

The problem was that i needed pyserial library for python.