To overwrite variables of Makefile, the definition should be placed as an argument of make command.
To overwrite variables of Makefile, the definition should be placed as an argument of make command.

xorphitus/mackerel-agent-plugins,hiroakis/mackerel-agent-plugins,mackerelio/mackerel-agent-plugins,hiroakis/mackerel-agent-plugins,ki38sato/mackerel-agent-plugins,ariarijp/mackerel-agent-plugins,xorphitus/mackerel-agent-plugins,xorphitus/mackerel-agent-plugins,ki38sato/mackerel-agent-plugins,ariarijp/mackerel-agent-plugins,mackerelio/mackerel-agent-plugins,hiroakis/mackerel-agent-plugins,mackerelio/mackerel-agent-plugins,mackerelio/mackerel-agent-plugins,xorphitus/mackerel-agent-plugins,ki38sato/mackerel-agent-plugins,y-kuno/mackerel-agent-plugins,ki38sato/mackerel-agent-plugins,hiroakis/mackerel-agent-plugins,ariarijp/mackerel-agent-plugins,ariarijp/mackerel-agent-plugins,y-kuno/mackerel-agent-plugins,y-kuno/mackerel-agent-plugins,y-kuno/mackerel-agent-plugins