I cannot build GHC HEAD on i386 at the moment and the last successful build I have is from March 2nd. To be sure, I verified it fails with both a cleaned build tree and also a fresh clone. Tools used: ghc 7.6.2 alex 3.0.5 happy 1.18.10 cabal 1.17.0 gcc 4.7.2 glibc 2.17 autoconf 2.69 perl 5.16.2 BuildFlavor: perf Can anyone else reproduce the following build error? libraries/vector/Data/Vector/Fusion/Stream/Monadic.hs:104:1: Failed to load interface for `GHC.Desugar' Perhaps you haven't installed the profiling libraries for package `base'? Use -v to see a list of the files searched for. In the expression: ForceSpecConstr In the annotation: {-# ANN type SPEC ForceSpecConstr #-} make[1]: *** [libraries/vector/dist-install/build/Data/Vector/Fusion/Stream/Monadic.p_o] Error 1 make: *** [all] Error 2