default.nix

{ pkgs ? import <nixpkgs> {
  config = {
    packageOverrides = super: let self = super.pkgs; in {
      dotnet-sdk-lts = super.dotnet-sdk.overrideDerivation (
        old: {
         src = super.fetchurl {
            url = "https://dotnetcli.azureedge.net/dotnet/Sdk/3.1.102/dotnet-sdk-3.1.102-linux-x64.tar.gz";
            sha256 = "e03ceeb5beaf7c228bd8dcbf7712cf12f5ccbfcd6d426afff78bfbd4524ff558";
          };
        }
      );
    };
  };
}}:

with pkgs;

mkShell {
  buildInputs = [
    ncurses # for `clear`
    emacs
    dotnet-sdk-lts
  ];
}