Installation fails if you have spice-protocol installed

[ssbarnea]

ssbarnea@imac: ~/rdo/me/harem master ⚡
$ brew install qt-virt-manager                                                                                                                            [18:25:05]
==> Installing qt-virt-manager from f1ash/qt-virt-manager
Error: Formulae found in multiple taps:
* f1ash/qt-virt-manager/spice-protocol
* jeffreywildman/virt-manager/spice-protocol

Please use the fully-qualified name e.g. f1ash/qt-virt-manager/spice-protocol to refer the formula.
FAIL: 1

ssbarnea@imac: ~/rdo/me/harem master ⚡
$ brew install f1ash/qt-virt-manager/spice-protocol                                                                                                       [18:25:10]
==> Installing spice-protocol from f1ash/qt-virt-manager
Error: spice-protocol 0.12.14 is already installed
To install 0.12.13, first run `brew unlink spice-protocol`
FAIL: 1

ssbarnea@imac: ~/rdo/me/harem master ⚡
$ brew unlink spice-protocol                                                                                                                              [18:25:33]
Unlinking /usr/local/Cellar/spice-protocol/0.12.14... 2 symlinks removed

ssbarnea@imac: ~/rdo/me/harem master ⚡