Sage should re-build packages when versions change.

[robertwb]

Even if they were formerly built.

Component: build

Author: Robert Bradshaw

Branch/Commit: u/robertwb/ticket/15221 @ 5a7ef36

Reviewer: Volker Braun

Issue created by migration from https://trac.sagemath.org/ticket/15221

[robertwb]

Branch: u/robertwb/ticket/15221

[vbraun]

Reviewer: Volker Braun

[vbraun]

New commits:

[changeset:5a7ef36]

Remove obsolete spkg installed markers.

[vbraun]

Commit: 5a7ef36

[vbraun]

comment:3

Looks good to me.