package-pinned-packages

package-pinned-packages is a variable defined in `package.el'.
Its value is

nil

• This variable may be risky if used as a file-local variable.

Documentation:
An alist of packages that are pinned to specific archives.
This can be useful if you have multiple package archives enabled,
and want to control which archive a given package gets installed from.

Each element of the alist has the form (PACKAGE . ARCHIVE), where:
PACKAGE is a symbol representing a package
ARCHIVE is a string representing an archive (it should be the car of
an element in `package-archives', e.g. "gnu").

Adding an entry to this variable means that only ARCHIVE will be
considered as a source for PACKAGE. If other archives provide PACKAGE,
they are ignored (for this package). If ARCHIVE does not contain PACKAGE,
the package will be unavailable.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.