[Yhc] yhc build failure -- possible missing dependency

Just pulled the latest YHC this morning and got:

YHC_build(["src/packages/yhc-base-1.0/Data/Set.hbc"], ["src/packages/yhc-base-1.0/Data/Set.hs"]) inst/bin/yhc -cpp -c src/packages/yhc-base-1.0/Data/Set.hs Warning: Can't find file "Typeable.h" in directories /home/eric/projects/yhc/src/packages/yhc-base-1.0/Data . Asked for by: /home/eric/projects/yhc/src/packages/yhc-base-1.0/Data/Set.hs at line 553 col 1 yhc: Error: File not found, Data.List Reason: imported from Data.Set Looked in: /home/eric/projects/yhc/src/packages/yhc-base-1.0/ . /home/eric/projects/yhc/inst/lib/yhc/packages/yhc-base/1.0

Building List by hand made it happy, so I'm guessing it's some sort of scons-thing. Eric