How to install the (latest version of) Nemo in Ubuntu 18.04 without cinnamon dependencies?

In previous Ubuntu versions there was a Nemo version without cinnamon dependencies but the PPA does not (yet?) include a version for Ubuntu 18.04 Bionic Beaver.
Is there another way to install the (latest version of) Nemo in Ubuntu 18.04 without cinnamon dependencies?

Doug provided a PPA for install the Nemo in Ubuntu 18.04 (only) without cinnamon dependencies (see his comment).
For newer Ubuntu versions: A unity session using Nemo in 20.04 can be set up to work reasonably well, especially if you use a modified nemo.desktop in the launcher (see Doug's comment).

He recommends to purge the installed nemo files before installing the new version. I did the following:

sudo apt purge cinnamon-desktop-data cinnamon-l10n gist hddtemp hwdata inxi libcinnamon-desktop4 libnemo-extension1 libxapp1 mesa-utils nemo nemo-data nemo-fileroller ruby-json xapps-common

Then added the PPA:

sudo add-apt-repository ppa:mc3man/bionic-noprop
sudo apt-get update

Then install Nemo:

sudo apt-get install nemo nemo-fileroller

To make Nemo the default file manager:

xdg-mime default nemo.desktop inode/directory application/x-gnome-saved-search

To handle the desktop just disable nautilus:

gsettings set org.gnome.desktop.background show-desktop-icons false

Reboot or log out

Thank you, Doug, for this great option.

I had the same problem, and the only (temporary) solution is to use the artful packages which should work (they're working for me) since Ubuntu 17.10 uses Gnome Shell anyway.

Just change /etc/apt/sources.list.d/webupd8team-ubuntu-nemo3-bionic.list to read deb http://ppa.launchpad.net/webupd8team/nemo3/ubuntu artful main You can also use the GUI by opening "Software & Updates" and editing the repo there, by changing bionic to artful.

Eventually, a Bionic repo will be available and then we can change the source again.