Add a nix package

Must be built with `nix build '.?submodules=1'` until this is merged:
  NixOS/nix#7862

default.nix

@@ -0,0 +1,40 @@
+{
+  config,
+  stdenv,
+  lib,
+  cudaPackages ? { },
+  ...
+}:
+
+stdenv.mkDerivation {
+  pname = "tdr-inverse";
+  version = "0.0.1";
+
+  src = ./.;
+
+  nativeBuildInputs = [
+    cudaPackages.cudatoolkit
+  ];
+
+  # buildPhase = ''
+  #   make
+  # '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    install ./bin/inverse $out/bin
+    install ./bin/cpu-inverse $out/bin
+    install ./bin/tdr-inverse $out/bin
+  '';
+
+  meta = with lib; {
+    name = "GPU-Based Matrix Inversion";
+    description = ''
+      Optimized GPU-Based Matrix Inversion
+      Though The Use of Thread-Data Remapping
+    '';
+    homepage = "https://github.com/scrufulufugus/tdr-inverse";
+    license = licenses.bsd3;
+    platforms = platforms.all;
+  };
+}

flake.nix

@@ -20,6 +20,11 @@
         };
       in
       {
+        packages.default = pkgs.callPackage ./. {
+          stdenv = pkgs.gcc11Stdenv;
+          cudaPackages = pkgs.cudaPackages_12_3;
+        };
+
         # TODO: Have to override with no CC since we're building with host CUDA
         #devShells.default = pkgs.mkShell.override { stdenv = pkgs.stdenvNoCC; } {
         devShells.default = pkgs.mkShell.override { stdenv = pkgs.gcc11Stdenv; } {