概要 gem install --user-install ffi -- --enable-libffi-alloc ターミナルで上記のコマンドを実行したら Ignoring ffi-1.15.5 because its extensions are not built. Try: gem pristine ffi --version 1.15.5 Ignoring json-1.8.6 because its extensions are not built. Try: gem pristine json --version 1.8.6 Fetch…
