That worked, and got me much farther. If you don't mind one more newb question, I'm now seeing the following. Any thoughts?

===--- building final phase
make -r --no-print-directory -f ghc.mk phase=final all
/usr/bin/install -c -m 755 utils/hp2ps/dist/build/tmp/hp2ps.exe inplace/bin/hp2ps.exe
cp driver/ghc-usage.txt inplace/lib/ghc-usage.txt
cp driver/ghci-usage.txt inplace/lib/ghci-usage.txt
"inplace/bin/ghc-stage1.exe" -o driver/ghci/dist/build/tmp/ghci.exe -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O     -i -idriver/ghci/. -idriver/ghci/dist/build -idriver/ghci/dist/build/autogen -Idriver/ghci/dist/build -Idriver/ghci/dist/build/autogen         -no-user-package-db -rtsopts      -odir driver/ghci/dist/build -hidir driver/ghci/dist/build -stubdir driver/ghci/dist/build    -static  -H32m -O     -i -idriver/ghci/. -idriver/ghci/dist/build -idriver/ghci/dist/build/autogen -Idriver/ghci/dist/build -Idriver/ghci/dist/build/autogen         -no-user-package-db -rtsopts      -no-auto-link-packages -no-hs-main  driver/ghci/dist/build/ghci.o driver/ghci/dist/build/../utils/cwrapper.o driver/ghci/dist/build/../utils/getLocation.o  driver/ghci/ghci.res
Warning: -rtsopts and -with-rtsopts have no effect with -no-hs-main.
    Call hs_init_ghc() from your main() function to set these options.
gcc.exe: error: driverghcidistbuildghci.o: No such file or directory
gcc.exe: error: driverghcidistbuild..utilscwrapper.o: No such file or directory
gcc.exe: error: driverghcidistbuild..utilsgetLocation.o: No such file or directory
gcc.exe: error: driverghcighci.res: No such file or directory
gcc.exe: error: C:msys64-2tmpghc6528_0ghc_4.o: No such file or directory
gcc.exe: error: C:msys64-2tmpghc6528_0ghc_2.o: No such file or directory
driver/ghci/ghc.mk:39: recipe for target 'driver/ghci/dist/build/tmp/ghci.exe' failed
make[1]: *** [driver/ghci/dist/build/tmp/ghci.exe] Error 1
Makefile:71: recipe for target 'all' failed
make: *** [all] Error 2