On Mon, Sep 14, 2026 at 01:52:56AM +1000, Viktor Dukhovni via ghc-devs wrote:
When trying to build GHC 9.14.2-rc1 with GHC 9.12.4 as the boot compiler the build failed due to a missing "Binary" instance for "HalfWord".
Alternatively, to build with GHC 9.14.1 as the boot compiler I needed to comment out the "index-state" setting in hadrian's "cabal.project": --- a/hadrian/cabal.project +++ b/hadrian/cabal.project @@ -5,5 +5,5 @@ packages: ./ -- This essentially freezes the build plan for hadrian -- It would be wise to keep this up to date with the state set in .gitlab/ci.sh. -index-state: 2025-01-27T17:45:32Z +-- index-state: 2025-01-27T17:45:32Z -- unordered-containers-0.2.20-r1 requires template-haskell < 2.22 Otherwise no build plan was found. -- Viktor. 🇺🇦 Слава Україні!