A precursor to Be Still Please, the Sour Shores EP includes a demo acoustic version of "Sour Shores," "And I Was a Boy From School"—a Hot Chip cover—and "Portraits From Before the War".

Everything is performed by Mac except:

on "Sour Shores" - drums: Lee waters, violin: Margaret White
on "Portraits From Before the War" - drums: Matt McCaughan, bass: Jim Wilbur, piano: Jason Borger