Lawmakers in Haiti's lower house of parliament have unanimously approved the nomination of a United Nations development expert to serve as prime minister.

Legislators Friday approved President Michel Martelly's designation of 45-year-old Garry Conille to the post. Conille is a medical doctor who has served as an aide to former U.S. President Bill Clinton in the latter's role as U.N. special envoy to Haiti.

The Haitian Senate must still approve the nomination.

Conille is the third candidate that President Martelly has put forward for the prime minister's job. Parliament refused to confirm his first two nominees. The delay in filling the post has stalled reconstruction efforts following a January 2010 earthquake that left more than 200,000 people dead. Hundreds of thousands of people are still living in tent camps.