Can't install on Laravel 6

[rxng]

Problem 1 - kalnoy/nestedset[v6.0.0, ..., v6.x-dev] require illuminate/support ^7.0|^8.0 -> found illuminate/support[v7.0.0, ..., 7.x-dev, v8.0.0, ..., 8.x-dev] but these were not loaded, likely because it conflicts with another require. - Root composer.json requires kalnoy/nestedset ^6.0 -> satisfiable by kalnoy/nestedset[v6.0.0, v6.x-dev].

[shaffe-fr]

Hi, For Laravel 6 I you have to use nestedset v5: composer require kalnoy/nestedset: ^5.