conda env fails to create new environment

Question

When trying to create a new environment of the tool viper, I get stuck while solving package specifications.

I have downloaded the tool from their website and unpacked it. Following the instructions I'm trying to create a conda environment named viper.

Using the command

conda env create -f environment.yml -n viper

the process got stuck as mentioned above. So I tried

conda create --file environment.yml -n viper

but I get the error

CondaValueError: could not parse 'name: viper' in: environment.yml

the header of my environment.yml file is attached below

 name: viper
 channels: #!!python/tuple
     - bioconda
     - conda-forge
     - defaults
 dependencies:
     - ...

What do I do wrong?

THe conda version I have is as such:

 $ conda info
 Current conda install:

           platform : linux-64
      conda version : 4.3.30
   conda is private : False
  conda-env version : 4.3.30
conda-build version : not installed
     python version : 3.6.3.final.0
   requests version : 2.18.4
   root environment : /home/yeroslaviz/miniconda3  (writable)
default environment : /home/yeroslaviz/miniconda3
   envs directories : /home/yeroslaviz/miniconda3/envs
                      /home/yeroslaviz/.conda/envs
      package cache : /home/yeroslaviz/miniconda3/pkgs
                      /home/yeroslaviz/.conda/pkgs
       channel URLs : https://repo.continuum.io/pkgs/main/linux-64
                      https://repo.continuum.io/pkgs/main/noarch
                      https://repo.continuum.io/pkgs/free/linux-64
                      https://repo.continuum.io/pkgs/free/noarch
                      https://repo.continuum.io/pkgs/r/linux-64
                      https://repo.continuum.io/pkgs/r/noarch
                      https://repo.continuum.io/pkgs/pro/linux-64
                      https://repo.continuum.io/pkgs/pro/noarch
        config file : None
         netrc file : None
       offline mode : False
         user-agent : conda/4.3.30 requests/2.18.4 CPython/3.6.3 Linux/4.4.0-72-generic debian/stretch/sid glibc/2.23    
            UID:GID : 1000:1000

thanks

Answer 1

conda create --file environment.yml -n viper won't work. This command tries to parse every line in the environment.yml as a package name.

You should use conda env create --file environment.yml -n viper.

Just wait patiently for the conflict resolution to be done.