Conda-only install (i.e. without requiring sudo)

[SamNPowers]

🚀 Feature

Users of the environment may not always have access to sudo; for instance, on my lab's clusters, I am mostly restricted to what I can conda-install. Thus a streamlined set of conda install instructions would make the environment accessible to more users.

Pitch

Here is the set of installs that seems to work for me, tested on two very different setups (1 RedHat with old system libraries, and 1 new ubuntu machine with a very minimal set of pre-installed libraries):

1. conda install cmake flex bison bzip2
2. conda install -c conda-forge cxx-compiler
3. install all of the sysroot libraries here: https://github.com/conda-forge/linux-sysroot-feedstock (it seems unlikely they are all necessary, but I have only tested with all)
4. pip install nle

[heiner]

Thanks for figuring this out and taking the time to write it up!

[heiner]

Thanks again for the write-up. I'll close the issue now but will refer to it in case this comes up in the future.

[Hust1Booze]

Thank you very much ! i suffer for hours with this.