I keep getting this error. Can anyone help? I tried removing the file as suggested, but it made no difference.

"/home/dfeuer/GHC/7.8.3.bin/bin/ghc" -o utils/genapply/dist/build/tmp/genapply -hisuf hi -osuf  o -hcsuf hc -static  -O -H64m -package pretty -package-db libraries/bootstrapping.conf   -i -iutils/genapply/. -iutils/genapply/dist/build -iutils/genapply/dist/build/autogen -Iutils/genapply/dist/build -Iutils/genapply/dist/build/autogen         -no-user-package-db -rtsopts      -odir utils/genapply/dist/build -hidir utils/genapply/dist/build -stubdir utils/genapply/dist/build    -static  -O -H64m -package pretty -package-db libraries/bootstrapping.conf   -i -iutils/genapply/. -iutils/genapply/dist/build -iutils/genapply/dist/build/autogen -Iutils/genapply/dist/build -Iutils/genapply/dist/build/autogen         -no-user-package-db -rtsopts      utils/genapply/dist/build/GenApply.o   
libffi/stamp.ffi.static-shared.install exists, but libffi/build/inst/lib/libffi.a does not.
Suggest removing libffi/stamp.ffi.static-shared.install.
make[1]: *** [libffi/build/inst/lib/libffi.a] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [all] Error 2