Can't boot with GHC 8.6.2

I just installed GHC 8.6.2 on a fresh Ubuntu 18.04 and cloned the repo. This is what I get when I do make without a 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/src -iutils/haddock/dist/build -Iutils/haddock/dist/build -iutils/haddock/dist/build/haddock/autogen -Iutils/haddock/dist/build/haddock/autogen    -optP-DIN_GHC_TREE -optP-include -optPutils/haddock/dist/build/haddock/autogen/cabal_macros.h -package-id Cabal-2.4.0.1 -package-id array-0.5.2.0 -package-id base-4.12.0.0 -package-id bytestring-0.10.8.2 -package-id containers-0.6.0.1 -package-id deepseq-1.4.4.0 -package-id directory-1.3.3.1 -package-id filepath-1.4.2.1 -package-id ghc-8.7 -package-id ghc-boot-8.7 -package-id parsec-3.1.13.0 -package-id text-1.2.3.1 -package-id transformers-0.5.5.0 -package-id xhtml-3000.2.2.1 -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-api/src/Haddock/Types.hs -o utils/haddock/dist/build/Haddock/Types.dyn_o

utils/haddock/haddock-api/src/Haddock/Types.hs:385:37: error:
    • Data constructor not in scope:
        NotPromoted :: BasicTypes.PromotionFlag
    • Perhaps you want to add ‘NotPromoted’ to the import list
      in the import of ‘BasicTypes’
      (utils/haddock/haddock-api/src/Haddock/Types.hs:37:1-30).
    |
385 |         tvar = L loc (HsTyVar NoExt NotPromoted (L loc name))
    |                                     ^^^^^^^^^^^

utils/haddock/haddock-api/src/Haddock/Types.hs:386:47: error:
    • Data constructor not in scope:
        NotPromoted :: BasicTypes.PromotionFlag
    • Perhaps you want to add ‘NotPromoted’ to the import list
      in the import of ‘BasicTypes’
      (utils/haddock/haddock-api/src/Haddock/Types.hs:37:1-30).
    |
386 |     mkType (UserTyVar _ name) = HsTyVar NoExt NotPromoted name
    |                                               ^^^^^^^^^^^
utils/haddock/ghc.mk:20: recipe for target 'utils/haddock/dist/build/Haddock/Types.dyn_o' failed
make[1]: *** [utils/haddock/dist/build/Haddock/Types.dyn_o] Error 1
Makefile:123: recipe for target 'all' failed
make: *** [all] Error 2

Trac metadata

Trac field	Value
Version	8.6.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture