###a.) first create env with most dependencies:
conda create -n groomp2 python=2.7 matplotlib scipy bamm cython pillow pytables tempdir diamond hmmer pplacer mfqe orfm
###b.) obtain pip3 and use it to install singlem globally (while currently in the base environment OR any python3 environment)
sudo apt update
sudo apt install python3-pip
conda deactivate
conda deactivate # deactivate not only conda environment but also conda entirely (until you don't even see the base einvironment)