warum muss ich immer diesen Fehler nach dem ausführen von "gem unberührte --all"

Ich versuche zu laufen gem pristine --all und ich bekomme immer diese in der Konsole.

wenn ich gem pristine --all ich dieses:

Permission denied....

Ich habe sogar versucht zu tun gem install für jeden gem bekommen und noch dies:

Ignoring binding_of_caller-0.7.2 because its extensions are not built. Try: gem pristine binding_of_caller --version 0.7.2
Ignoring byebug-5.0.0 because its extensions are not built. Try: gem pristine byebug --version 5.0.0
Ignoring debug_inspector-0.0.2 because its extensions are not built. Try: gem pristine debug_inspector --version 0.0.2
Ignoring executable-hooks-1.3.2 because its extensions are not built. Try: gem pristine executable-hooks --version 1.3.2
Ignoring gem-wrappers-1.2.7 because its extensions are not built. Try: gem pristine gem-wrappers --version 1.2.7
Ignoring json-1.8.3 because its extensions are not built. Try: gem pristine json --version 1.8.3
Ignoring mysql-2.9.1 because its extensions are not built. Try: gem pristine mysql --version 2.9.1
Ignoring mysql2-0.3.18 because its extensions are not built. Try: gem pristine mysql2 --version 0.3.18
Ignoring nokogiri-1.6.6.2 because its extensions are not built. Try: gem pristine nokogiri --version 1.6.6.2
Ignoring pg-0.18.2 because its extensions are not built. Try: gem pristine pg --version 0.18.2