Extract the zip file to the themes directory i.e. /usr/share/themes/ or ~/.themes/ (create it if necessary).
To set the theme in Gnome, run the following commands in Terminal,
gsettings set org.gnome.desktop.interface gtk-theme "Ant-Nebula"
gsettings set org.gnome.desktop.wm.preferences theme "Ant-Nebula"
or Change via distribution specific tool.
- This theme is based on the evopop-gtk-theme.