Music Box Films has picked up North American rights to Ira Sachs’ “Keep the Lights On,” the relationship drama that bowed at Sundance earlier this year and will screen as part of the Tribeca Film Festival next month.

Penned by Sachs (“Forty Shades of Blue”) and Mauricio Zacharias, pic traces the arc of a nine-year relationship between two Gotham men (Thure Lindhardt, Zachary Booth) who initially meet through casual sex. Julianne Nicholson, Souleymane Sy Savane and Paprika Steen also appear in the film, which scored the kudo for LGBT film at Berlin.

“Keep the Lights On” is produced by Sachs, Marie Therese Guirgis and Lucas Joaquin, with the distribution deal inked by Guirgis and Preferred Content’s Kevin Iwashina with Music Box prexy William Schopf.

Release dates have yet to be set for “Keep the Lights On.” Multiplatform arthouse distributor Music Box, which released the Swedish-language film version of “The Girl With the Dragon Tattoo,” also has pics including “The Deep Blue Sea” and “Monsieur Lazhar” on its upcoming slate.