Trying to build HEAD I get. "inplace/bin/ghc-stage1@exeext_host@" -fPIC -dynamic -H32m -O -Werror -Wall -H64m -O0 -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -package-name rts -dcmm-lint -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen -O2 -c rts/PrimOps.cmm -o rts/dist/build/PrimOps.dyn_o "inplace/bin/ghc-stage1@exeext_host@" -fPIC -dynamic -H32m -O -Werror -Wall -H64m -O0 -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -package-name rts -dcmm-lint -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen -O2 -c rts/dist/build/AutoApply.cmm -o rts/dist/build/AutoApply.dyn_o "inplace/bin/ghc-pkg@exeext_host@" --simple-output field rts extra-libraries \ | sed -e 's/\([^ ][^ ]*\)/-l\1/g' > rts/dist/libs.depend "inplace/bin/ghc-pkg@exeext_host@" --simple-output field rts library-dirs \ | sed -e 's/\([^ ][^ ]*\)/-L\1/g' >> rts/dist/libs.depend make[1]: *** No rule to make target `libffi/build/inst/lib/libffi@soext_target@', needed by `rts/dist/build/libffi@soext_target@'. Stop. make: *** [all] Error 2 I know there is some repository moving shenanigans going on at the moment so I am not sure whether that's something to look out for. All I did was ./sync-all get and then ./sync-all pull without changing anything – I have the same setup as I did couple of weeks ago. -- Mateusz K.