Failed installing Ubuntu using termux-ubuntu

I want to mine sugar on my Android phone.
Can someone help a simple complete script, especially to complete method 1 or 2, whichever works.

METHOD 1

Installed F-Droid and Termux

Commands

pkg install automake clang git vim

press y to continue



clone git https://github.com/decryp2kanon/sugarmaker

When it's done, I enter

$ cd sugarmaker/

-/sugarmaker $ ./autogen.sh

it says

bash:  no such file or directory

METHOD 2

These two methods I tried each of them on both phones.
On method 2, when I get here, it keeps saying error on Huawei Y Pro phone and Huawei P20 Lite.

pkg update

press y to continue



pkg upgrade

press y to continue



pkg install git



pkg install wget

press y to continue



pkg install proot

press y to continue



git clone http://github.com/Neo-oli/termux-ubuntu.get

The problem start here on P20 Lite

-$ cd termux-ubuntu

-/termux-ubuntu $ ./ubuntu.sh

It says decompressing Ubuntu image, but this does not look like a trz archive.

Making start Ubuntu executable. You can now launch Ubuntu with ./start-ubuntu.sh script.

And it shows code 404 like the link to the image is not working also.