Has anyone seen this one before? # libffi.so needs to be built with the correct soname. # NOTE: this builds libffi_convience.so with the incorrect # soname, but we don't need that anyway! cd libffi && \ "cp" build/libtool build/libtool.orig; \ sed -e s/soname_spec=.*/soname_spec="libHSffi-ghc7.1.20110609.sohttp://libhsffi-ghc7.1.20110609.so/"/ build/libtool.orig > build/libtool cp: cannot stat `build/libtool': No such file or directory sed: can't read build/libtool.orig: No such file or directory make[2]: *** [libffi/stamp.ffi.configure] Error 2 make[1]: *** [all_libffi] Error 2 make[1]: Leaving directory `/home/newton/build/haskell2/ghc-validate' make: *** [all] Error 2 Thanks, -Ryan P.S. It's not new. I just did a "git pull origin master && ./sync-all pull origin master" and got this error but I also got the same error on this machine back on June 9th. However, this package has built GHC HEAD in the past. It has the standard ubuntu libffi-dev and libffi5 packages installed.