It is a simple repo to have dark Upsilon theme.
Bootloader themes are made to be used with bootloader building only !!
Just compile Upsilon with this args:
THEME_NAME=upsilon_dark THEME_REPO=https://github.com/hugo-b-r/Upsilon-Themes.git
Don't forget to use username and -j flag if you respectively want to compile with your username and build using multiple threads.
Command-line options for Omega/Upsilon build:
THEME_NAME=upsilon_dark THEME_REPO=https://github.com/hugo-b-r/Upsilon-Themes.git
Command-line options for Omega/Upsilon build:
THEME_NAME=upsilon_cursed_dark THEME_REPO=https://github.com/hugo-b-r/Upsilon-Themes.git
Command-line options for Omega/Upsilon build:
THEME_NAME=upsilon_light_bladeless THEME_REPO=https://github.com/hugo-b-r/Upsilon-Themes.git
Command-line options for Omega/Upsilon build:
THEME_NAME=fc-nivolet_dark THEME_REPO=https://github.com/hugo-b-r/Upsilon-Themes.git