# Clean up placeholders in vbox
        _ = [self.vbox.remove(c) for c in self.vbox.get_children()[3:]]
        
        # Attach available downloads after checking dependencies
        # e.g. newpl["depends"] = "streamtuner2 < 2.2.0, config >= 2.5"
        dep = pluginconf.dependency()
        for newpl in meta:
            if dep.valid(newpl, log.DEBUG_VALIDITY) and dep.depends(newpl, log.DEBUG_DEPENDS):
                self.add_plugin(newpl)
            else:
                log.DEBUG("plugin fails dependencies:", newpl)

        # Readd some filler labels
        _ = [self.add_(uikit.label("")) for i in range(1,3)]


    # Append to vbox
    def add_(self, w, label=None, markup=0, align=10, label_size=400):

        for name, meta in self.have.items():
            if meta.get("alias"):
                for alias in re.split("\s*[,;]\s*", meta["alias"]):
                    self.have[alias] = self.have[name]

    # basic plugin pre-screening (skip __init__, filter by api:,
    # exclude installed & same-version plugins)
    def valid(self, newpl, _log=lambda *x:0):
        id = newpl.get("$name", "__invalid")
        have_ver = self.have.get(id, {}).get("version", "0")
        if id.find("__") == 0:
            _log("wrong id")
            pass
        elif newpl.get("api") not in ("python", "streamtuner2"):
            _log("wrong api")
            pass
        elif set((newpl.get("status"), newpl.get("priority"))).intersection(set(("obsolete", "broken"))):
            _log("wrong status")
            pass
        elif have_ver >= newpl.get("version", "0.0"):
            _log("newer version already installed")
            pass
        else:
            return True

    # Verify depends: and breaks: against existing plugins/modules
    def depends(self, plugin, _log=lambda *x:0):
        r = True
        if plugin.get("depends"):
            r &= self.and_or(self.split(plugin["depends"]), self.have)
        if plugin.get("breaks"):
            r &= self.neither(self.split(plugin["breaks"]), self.have)
        _log(r)
        return r

    # Split trivial "pkg | alt, mod >= 1, uikit < 4.0" string into nested list [[dep],[alt,alt],[dep]]
    def split(self, dep_str):
        dep_cmp = []
        for alt_str in re.split(r"\s*[,;]+\s*", dep_str):
            alt_cmp = []