title: tmux error in conda environment: "create window failed: fork failed: No such file or directory"
body: <p>I've just created and activated a new conda environment on Mac OS (<code>conda create --name tmux; source activate tmux</code>) and installed tmux using <code>conda install -c conda-forge tmux</code>. So far so good, but then when I run <code>tmux</code> I get the error message <code>create window failed: fork failed: No such file or directory</code>. This is pretty mysterious to me and I haven't been able to find any info about what this issue is and how to fix. I do not have a <code>.tmux.conf</code> file. Here is the output from running <code>conda info</code>:</p>
  <pre><code>active environment : tmux                                                                                                                                 │
      active env location : /Users/me/miniconda3/envs/tmux                                                                                                  │    add new simulation code, updated method of coding introgression that has correct initial proportion, for thesis proposal
              shell level : 2                                                                                                                                    │~
         user config file : /Users/me/.condarc                                                                                                              │~
   populated config files :                                                                                                                                      │~
            conda version : 4.12.0                                                                                                                               │~
      conda-build version : not installed                                                                                                                        │~
           python version : 3.9.12.final.0                                                                                                                       │~
         virtual packages : __osx=10.13.6=0                                                                                                                      │~
                            __unix=0=0                                                                                                                           │~
                            __archspec=1=x86_64                                                                                                                  │~
         base environment : /Users/me/miniconda3  (writable)                                                                                                │~
        conda av data dir : /Users/me/miniconda3/etc/conda                                                                                                  │~
    conda av metadata url : None                                                                                                                                 │~
             channel URLs : https://repo.anaconda.com/pkgs/main/osx-64                                                                                           │~
                            https://repo.anaconda.com/pkgs/main/noarch                                                                                           │~
                            https://repo.anaconda.com/pkgs/r/osx-64                                                                                              │~
                            https://repo.anaconda.com/pkgs/r/noarch                                                                                              │~
            package cache : /Users/me/miniconda3/pkgs                                                                                                       │~
                            /Users/me/.conda/pkgs                                                                                                           │~
         envs directories : /Users/me/miniconda3/envs                                                                                                       │~
                            /Users/me/.conda/envs                                                                                                           │~
                 platform : osx-64                                                                                                                               │~
               user-agent : conda/4.12.0 requests/2.27.1 CPython/3.9.12 Darwin/17.7.0 OSX/10.13.6                                                                │~
                  UID:GID : 511:20                                                                                                                               │~
               netrc file : None                                                                                                                                 │~
             offline mode : False                                                                                                                                │~
  
  </code></pre>
  <p>Here is the output from <code>conda list</code>:</p>
  <pre><code># packages in environment at /Users/brogroh/miniconda3/envs/tmux:                                                                                              │~
  #                                                                                                                                                              │~
  # Name                    Version                   Build  Channel                                                                                             │~
  ca-certificates           2022.5.18.1          h033912b_0    conda-forge                                                                                       │~
  libevent                  2.1.10               h7d65743_4    conda-forge                                                                                       │~
  ncurses                   6.3                  h96cf925_1    conda-forge                                                                                       │~
  openssl                   3.0.3                hfe4f2af_0    conda-forge                                                                                       │~
  tmux                      3.2a                 h749c5dd_0    conda-forge
  </code></pre>