@infinisil Thanks for adding this! If you don't mind, I would like to add you to the acknowledgements.
What command does a user need to run to install this package on NixOS?

@M4444 It will take some time until the package is built and available in the official channels, but after that, nix-env -f channel:nixpkgs-unstable -iA tmatrix should work.

Ok. Is there a way to follow this somewhere and know when it's out so I know when to add the command to the project description?

I wish there was! Currently the best I know of is watching nixpkgs-unstable in http://howoldis.herokuapp.com/ and once it updates, check whether the commit there contains tmatrix. I'll put a comment here when I notice it updated.

Got it, thanks.

@M4444 The channel just updated, nix-env -f channel:nixpkgs-unstable -iA tmatrix can now be used to install tmatrix for Nix / on NixOS :)

Thanks for the notification! Added the command project description.

Just wanted to mention that that CMake now also installs the man page, and the newly added shell completion scripts.

Now that the package is in the official channel would it be enough to use nix-env -iA tmatrix or nix-env -i tmatrix to install it?

Yup! Though it's nix-env -iA nixos.tmatrix on NixOS and nix-env -iA nixpkgs.tmatrix on non-NixOS. What works on all Nix systems is nix-env -f '<nixpkgs>' -iA tmatrix though.

Got it, thanks!