Python and installing extras

[Ecniv]

c:\Python>python -m pip install Flask-SQLAlchemy
Requirement already satisfied: Flask-SQLAlchemy in c:\python\lib\site-packages (2.3.2)
Requirement already satisfied: Flask>=0.10 in c:\python\lib\site-packages (from Flask-SQLAlchemy) (1.0.2)
Requirement already satisfied: SQLAlchemy>=0.8.0 in c:\python\lib\site-packages (from Flask-SQLAlchemy) (1.3.1)
Requirement already satisfied: itsdangerous>=0.24 in c:\python\lib\site-packages (from Flask>=0.10->Flask-SQLAlchemy) (1.1.0)
Requirement already satisfied: Jinja2>=2.10 in c:\python\lib\site-packages (from Flask>=0.10->Flask-SQLAlchemy) (2.10)
Requirement already satisfied: click>=5.1 in c:\python\lib\site-packages (from Flask>=0.10->Flask-SQLAlchemy) (7.0)
Requirement already satisfied: Werkzeug>=0.14 in c:\python\lib\site-packages (from Flask>=0.10->Flask-SQLAlchemy) (0.14.1)
Requirement already satisfied: MarkupSafe>=0.23 in c:\python\lib\site-packages (from Jinja2>=2.10->Flask>=0.10->Flask-SQLAlchemy) (1.1.1)

Rest is ok and already there.
Just when I try to pip install the