Why didn't toolbox fit your needs? I found toolbox to be a very reasonable way to install development dependencies on a per project basis while not managing multiple hidden filesystems.
toolbx is not actually intended to provide any security or isolation, see e.g. https://github.com/containers/toolbox/issues/183
toolbx is not actually intended to provide any security or isolation, see e.g. https://github.com/containers/toolbox/issues/183