Kathmandu: Nepali lawmakers were Wednesday set to miss a self-imposed deadline for promulgation of the country's new constitution after the various political parties failed to reach a consensus on key issues eluding a resolution.

Jan 22 was the deadline the lawmakers imposed upon themselves last year in the wake of the election to the second Constituent Assembly (CA) after the first CA -- elected for a two-year term -- failed in the Himalayan task from May 28, 2008 to May 28, 2012.