Is anyone else having this problem when building with default settings (no build.mk): "inplace/bin/ghc-stage2" -hisuf dyn_hi -osuf dyn_o -hcsuf dyn_hc -fPIC -dynamic -H32m -O -Wall -hide-all-packages -i -iutils/haddock/driver -iutils/haddock/haddock-api/src -iutils/haddock/haddock-library/vendor/attoparsec-0.12.1.1 -iutils/haddock/haddock-library/src -iutils/haddock/dist/build -iutils/haddock/dist/build/autogen -Iutils/haddock/dist/build -Iutils/haddock/dist/build/autogen -optP-DIN_GHC_TREE -optP-include -optPutils/haddock/dist/build/autogen/cabal_macros.h -package-id Cabal-1.25.0.0 -package-id array-0.5.1.1 -package-id base-4.9.0.0 -package-id bytestring-0.10.8.1 -package-id containers-0.5.7.1 -package-id deepseq-1.4.2.0 -package-id directory-1.2.6.2 -package-id filepath-1.4.1.0 -package-id ghc-8.1 -package-id ghc-boot-8.1 -package-id transformers-0.5.2.0 -package-id xhtml-3000.2.1 -funbox-strict-fields -Wall -fwarn-tabs -O2 -threaded -XHaskell2010 -no-user-package-db -rtsopts -Wno-unused-imports -Wno-deprecations -Wnoncanonical-monad-instances -odir utils/haddock/dist/build -hidir utils/haddock/dist/build -stubdir utils/haddock/dist/build -c utils/haddock/haddock-library/src/Documentation/Haddock/Types.hs -o utils/haddock/dist/build/Documentation/Haddock/Types.dyn_o utils/haddock/haddock-library/src/Documentation/Haddock/Types.hs:15:8: error: Failed to load interface for ‘Prelude’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/haddock-library/src/Documentation/Haddock/Types.hs:17:1: error: Failed to load interface for ‘Data.Foldable’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/haddock-library/src/Documentation/Haddock/Types.hs:18:1: error: Failed to load interface for ‘Data.Traversable’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/driver/ResponseFile.hs:2:8: error: Failed to load interface for ‘Prelude’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/driver/ResponseFile.hs:8:1: error: Failed to load interface for ‘Control.Exception’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/driver/ResponseFile.hs:9:1: error: Failed to load interface for ‘Data.Char’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/driver/ResponseFile.hs:10:1: error: Failed to load interface for ‘Data.Foldable’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/driver/ResponseFile.hs:11:1: error: Failed to load interface for ‘System.Exit’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/driver/ResponseFile.hs:12:1: error: Failed to load interface for ‘System.IO’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:16:8: error:utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Types.hs:1:8: error: Failed to load interface for ‘Prelude’ It is a member of the hidden package Failed to load interface for ‘base-4.9.0.0’. Use -v to see a list of the files searched for. ‘Prelude’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:19:1: error: Failed to load interface for ‘Control.Arrow’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Types.hs:4:1: error:utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:20:1: error: Failed to load interface for Failed to load interface for ‘GHC’ ‘Data.Function’ It is a member of the hidden package It is a member of the hidden package ‘base-4.9.0.0’. ‘ghc-8.1’. Use -v to see a list of the files searched for. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:22:1: error: Failed to load interface for ‘Exception’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:23:1: error: Failed to load interface for ‘Outputable’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:24:1: error: Failed to load interface for ‘Name’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:25:1: error: Failed to load interface for ‘Lexeme’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:26:1: error: Failed to load interface for ‘Module’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:27:1: error: Failed to load interface for ‘RdrName’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:28:1: error: Failed to load interface for ‘GhcMonad’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:29:1: error: Failed to load interface for ‘HscTypes’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:30:1: error: Failed to load interface for ‘UniqFM’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:31:1: error: Failed to load interface for ‘GHC’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/haddock-api/src/Haddock/GhcUtils.hs:32:1: error: Failed to load interface for ‘Class’ It is a member of the hidden package ‘ghc-8.1’. Use -v to see a list of the files searched for. utils/haddock/ghc.mk:21: recipe for target 'utils/haddock/dist/build/ResponseFile.dyn_o' failed make[1]: *** [utils/haddock/dist/build/ResponseFile.dyn_o] Error 1 make[1]: *** Waiting for unfinished jobs.... utils/haddock/ghc.mk:21: recipe for target 'utils/haddock/dist/build/Documentation/Haddock/Types.dyn_o' failed make[1]: *** [utils/haddock/dist/build/Documentation/Haddock/Types.dyn_o] Error 1 utils/haddock/ghc.mk:21: recipe for target 'utils/haddock/dist/build/Haddock/Backends/Hyperlinker/Types.dyn_o' failed make[1]: *** [utils/haddock/dist/build/Haddock/Backends/Hyperlinker/Types.dyn_o] Error 1 utils/haddock/ghc.mk:21: recipe for target 'utils/haddock/dist/build/Haddock/GhcUtils.dyn_o' failed make[1]: *** [utils/haddock/dist/build/Haddock/GhcUtils.dyn_o] Error 1 Makefile:129: recipe for target 'all' failed make: *** [all] Error 2 ( make distclean && ./boot && ./configure && make -j4; ) 2>&1 6382.95s user 1069.99s system 336% cpu 36:57.03 total tee build_output 0.04s user 0.60s system 0% cpu 36:57.03 total This is d40682e + one commit that I'm sure wouldn't break the build this way. I can't compile anything with stage2 compiler becuase of this: ➜ strict_cmm ghc-stage2 Main.hs [1 of 1] Compiling Lib ( Main.hs, Main.o ) [Prelude changed] Main.hs:4:1: error: Failed to load interface for ‘Prelude’ It is a member of the hidden package ‘base-4.9.0.0’. Use -v to see a list of the files searched for. -v output: ➜ strict_cmm ghc-stage2 Main.hs -v Glasgow Haskell Compiler, Version 8.1.20160528, stage 2 booted by GHC version 8.0.1 Using binary package database: /home/omer/haskell/ghc_3/inplace/lib/package.conf.d/package.cache loading package database /home/omer/haskell/ghc_3/inplace/lib/package.conf.d wired-in package ghc-prim mapped to ghc-prim-0.5.0.0 wired-in package integer-gmp mapped to integer-gmp-1.0.0.1 wired-in package base mapped to base-4.9.0.0 wired-in package rts mapped to rts wired-in package template-haskell mapped to template-haskell-2.11.0.0 wired-in package ghc mapped to ghc-8.1 wired-in package dph-seq not found. wired-in package dph-par not found. Hsc static flags: loading package database /home/omer/haskell/ghc_3/inplace/lib/package.conf.d wired-in package ghc-prim mapped to ghc-prim-0.5.0.0 wired-in package integer-gmp mapped to integer-gmp-1.0.0.1 wired-in package base mapped to base-4.9.0.0 wired-in package rts mapped to rts-1.0 wired-in package template-haskell mapped to template-haskell-2.11.0.0 wired-in package ghc mapped to ghc-8.1 wired-in package dph-seq not found. wired-in package dph-par not found. *** Chasing dependencies: Chasing modules from: *Main.hs !!! Chasing dependencies: finished in 0.44 milliseconds, allocated 0.417 megabytes Stable obj: [Lib] Stable BCO: [] Ready for upsweep [NONREC ModSummary { ms_hs_date = 2016-05-28 13:53:06.703533428 UTC ms_mod = Lib, ms_textual_imps = [(Nothing, Prelude)] ms_srcimps = [] }] *** Deleting temp files: Deleting: compile: input file Main.hs *** Checking old interface for Lib: [1 of 1] Compiling Lib ( Main.hs, Main.o ) [Prelude changed] *** Parser [Lib]: !!! Parser [Lib]: finished in 0.42 milliseconds, allocated 0.466 megabytes *** Renamer/typechecker [Lib]: !!! Renamer/typechecker [Lib]: finished in 0.05 milliseconds, allocated 0.004 megabytes Main.hs:4:1: error: Failed to load interface for ‘Prelude’ It is a member of the hidden package ‘base-4.9.0.0’. Locations searched: Prelude.hs Prelude.lhs Prelude.hsig Prelude.lhsig Upsweep partially successful. *** Deleting temp files: Deleting: link(batch): upsweep (partially) failed OR Main.main not exported; not linking. *** Deleting temp files: Deleting: *** Deleting temp dirs: Deleting: Any ideas?