conda env create with exported file cannot find wheel package

[Abhishek Ranjan]

Hi, 

I am trying to export an environment and trying to replicate it to create another environment. 

Export using 'conda env export'  looks as follows:

name: null

channels:

- conda-forge

- r

- defaults

dependencies:

- backports_abc=0.5=py34_0

.

.

.

 wheel=0.30.0=py_1

.

.

When I try to create a new project using this exported file, I see this error: 

    Traceback (most recent call last):

      File "~/conda_env/lib/python3.6/site-packages/conda/exceptions.py", line 632, in conda_exception_handler

        return_value = func(*args, **kwargs)

      File "~/conda_env/lib/python3.6/site-packages/conda_env/cli/main_create.py", line 108, in execute

        installer.install(prefix, pkg_specs, args, env)

      File "~/conda_env/lib/python3.6/site-packages/conda_env/installers/conda.py", line 32, in install

        channel_priority_map=_channel_priority_map)

      File "~/conda_env/lib/python3.6/site-packages/conda/plan.py", line 475, in install_actions_list

        dists_for_envs = determine_all_envs(r, specs, channel_priority_map=channel_priority_map)

      File "~/conda_env/lib/python3.6/site-packages/conda/plan.py", line 540, in determine_all_envs

        spec_for_envs = tuple(SpecForEnv(env=p.preferred_env, spec=p.name) for p in best_pkgs)

      File "~/conda_env/lib/python3.6/site-packages/conda/plan.py", line 540, in <genexpr>

        spec_for_envs = tuple(SpecForEnv(env=p.preferred_env, spec=p.name) for p in best_pkgs)

      File "~/conda_env/lib/python3.6/site-packages/conda/plan.py", line 539, in <genexpr>

        best_pkgs = (r.index[r.get_dists_for_spec(s, emptyok=False)[-1]] for s in specs)

      File "~/conda_env/lib/python3.6/site-packages/conda/resolve.py", line 565, in get_dists_for_spec

        raise NoPackagesFoundError([(ms,)])

    conda.exceptions.NoPackagesFoundError: Package missing in current linux-64 channels: 

      - wheel 0.30.0 py_1

Can someone tell me what does py_1 in the entry ''wheel=0.30.0=py_1" mean? If my version of wheel is 0.29.0, then I see the entry as   '- wheel=0.29.0=py27_0'  and then I do not see any error. 

conda info shows the following for the failing environment : 

Current conda install:

               platform : linux-64

          conda version : 4.3.21

       conda is private : False

      conda-env version : 4.3.21

    conda-build version : not installed

         python version : 3.6.1.final.0

       requests version : 2.14.2

       root environment : ~/conda_env  (writable)

    default environment : ~/conda_env

       envs directories : ~/conda_env/envs

                          ~/testImportedProject17/.conda/envs

          package cache :~/conda_env/pkgs

                          ~/testImportedProject17/.conda/pkgs

           channel URLs : 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/4.3.21 requests/2.14.2 CPython/3.6.1 Linux/4.10.0-42-generic debian/8.9 glibc/2.19    

                UID:GID : 30632126:30632126