dotnet: force ICU to be loaded during tests

                export DOTNET_ROOT=${runtime}

              '' + run);

      # Setting LANG to something other than 'C' forces the runtime to search

      # for ICU, which will be required in most user environments.

      checkConsoleOutput = command: ''

        output="$(${command})"

        output="$(LANG=C.UTF-8 ${command})"

        # yes, older SDKs omit the comma

        [[ "$output" =~ Hello,?\ World! ]] && touch "$out"

      '';