Does anyone know why a build would be failing with utils/haddock/dist/build/Haddock/GhcUtils.dyn_o: In function `skOK_info': (.text+0x75c8): undefined reference to `stg_ap_0_upd_info' utils/haddock/dist/build/Haddock/GhcUtils.dyn_o: In function `skP5_info': (.text+0x7728): undefined reference to `stg_ap_0_upd_info' collect2: error: ld returned 1 exit status `gcc' failed in phase `Linker'. (Exit code: 1) utils/haddock/ghc.mk:21: recipe for target 'utils/haddock/dist/build/tmp/haddock' failed make[1]: *** [utils/haddock/dist/build/tmp/haddock] Error 1 This is happening on https://phabricator.haskell.org/harbormaster/build/8393/, a build of https://phabricator.haskell.org/D1558 Alan