Trying to build a fresh copy of GHC HEAD (at commit [1]) today failed for me with this error: [2] /u/rgscott/Software/ghc4/libffi/build/missing: line 81: makeinfo: command not found WARNING: 'makeinfo' is missing on your system. You should only need it if you modified a '.texi' file, or any other file indirectly affecting the aspect of the manual. You might want to install the Texinfo package: http://www.gnu.org/software/texinfo/ The spurious makeinfo call might also be the consequence of using a buggy 'make' (AIX, DU, IRIX), in which case you might want to install GNU make: http://www.gnu.org/software/make/ On my Ubuntu machine, I was able to work around the issue by running: apt-get install texinfo But I'm not sure if the texinfo requirement was expected or an unintended side effect of recent libffi changes. Do you know what's happening here Moritz? Best, Ryan S. ----- [1] http://git.haskell.org/ghc.git/commit/e515c7f37be97e1c2ccc497ddd0a730e63ddfa... [2] http://lpaste.net/6716863452582772736