.1
        foo>=2.1,!=3.1,<4

    # wanted
    baz

    # resolved
    VersionConflict

    # resolved [replace conflicting]
    baz-0.1
    foo-2.9
    zô
    # id
    conflicting_installables

    # installed

    # installable
    foo-2.9
    foo-5.0

    # wanted
    foo>=2.1,!=3.1,<4
    foo>=4

    # resolved
    VersionConflict

    # resolved [replace conflicting]
    VersionConflict
    a+