cygwin expect-all build failure

Using a fresh SID from CVS on Cygwin on Win2k.
It's been a real journey getting this far.
I hope this is something minor.

/usr/local/src/sid-cvs/build $ make all-expect
make[1]: Entering directory `/usr/local/src/sid-cvs/build/tcl'
make[2]: Entering directory `/usr/local/src/sid-cvs/build/tcl/win'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/usr/local/src/sid-cvs/build/tcl/win'
make[2]: Entering directory `/usr/local/src/sid-cvs/build/tcl/cygwin'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/usr/local/src/sid-cvs/build/tcl/cygwin'
make[1]: Leaving directory `/usr/local/src/sid-cvs/build/tcl'
make[1]: Entering directory `/usr/local/src/sid-cvs/build/tk'
make[2]: Entering directory `/usr/local/src/sid-cvs/build/tk/win'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/usr/local/src/sid-cvs/build/tk/win'
make[1]: Leaving directory `/usr/local/src/sid-cvs/build/tk'
make[1]: Entering directory `/usr/local/src/sid-cvs/build/expect'
gcc -c  -I. -I../../src/expect -I/usr/local/src/sid-cvs/src/tcl/generic -I/usr/local/src/sid-cvs/src/tk/generic  -DEXP_VERSION=\"5.26\" -DSCRIPTDIR=\"/usr/local/sid/share\" -DEXECSCRIPTDIR=\"/usr/local/sid/lib\" -DTCL_DEBUGGER -g -O2 -mno-win32  -DCYGWIN_ALTTCL -DDFLT_STTY="\"sane\""  ../../src/expect/Dbg.c
../../src/expect/Dbg.c:13:20: Dbg_cf.h: No such file or directory
../../src/expect/Dbg.c: In function `print_argv':
../../src/expect/Dbg.c:387: warning: passing arg 4 of `TclFindElement' from incompatible pointer type
../../src/expect/Dbg.c:387: warning: passing arg 5 of `TclFindElement' from incompatible pointer type
../../src/expect/Dbg.c: In function `simple_interactor':
../../src/expect/Dbg.c:1148: warning: initialization discards qualifiers from pointer target type
make[1]: *** [Dbg.o] Error 1
make[1]: Leaving directory `/usr/local/src/sid-cvs/build/expect'
make: *** [all-expect] Error 2
/usr/local/src/sid-cvs/build $