It's an EP, it was released at the time of the Death to The Pixies box set if I recall correctly. The following EPs were released:
Debaser studio ep - CD5 1997 UK: 4AD (BAD 7010 CD) Debaser (Cliff Norrell Mix) Bone Machine Gigantic Isla De Encanta
Debaser has been slightly remixed for the single (Clif Norrel Mix). Tracks 2-4 studio session recorded for VPRO Radio 3 program "De Wilde Wereld" in 1990.
Debaser live ep - CD5 1997 UK: 4AD (BADD 7010 CD) Debaser The Holiday Song Cactus Nimrod’s Son
All live tracks, recorded 8-10-89 at Cabaret Metro for Chicago's WXRT.
Debaser demo 7" ep - 1997 UK: 4AD (AD 7010) Debaser #13 Baby
Denis I know the god of rock n roll / Yeah I sold him my soul!