## Summary It is not possible to build current ghc-9.10 with itself, since hadrian requires older Cabal < 3.11, whereas 9.10 ships 3.12 ## Steps to reproduce Try to build ghc-9.10.1 hadrian with ghc-9.10.1 Cabal. ``` Configuring hadrian-0.1.0.0... Error: Setup: Encountered missing or private dependencies: Cabal >=3.10 && <3.11 ``` Patching hadrian.cabal leads to: ``` [101 of 108] Compiling Hadrian.Haskell.Cabal.Parse src/Hadrian/Haskell/Cabal/Parse.hs:413:9: error: Not in scope: ‘C.initialBuildSteps’ NB: neither ‘Distribution.Simple’, ‘Distribution.Simple.Build’, ‘Distribution.Simple.Compiler’, ‘Distribution.Simple.Configure’, ‘Distribution.Simple.PackageDescription’, ‘Distribution.Simple.PackageIndex’, ‘Distribution.Simple.Program.Builtin’, ‘Distribution.Simple.Program.Db’, ‘Distribution.Simple.Program.Types’, ‘Distribution.Simple.Register’, ‘Distribution.Simple.Utils’, ‘Distribution.Types.ComponentLocalBuildInfo’, ‘Distribution.Types.LocalBuildInfo’, ‘Distribution.Verbosity’, ‘Distribution.ModuleName’, ‘Distribution.Package’, ‘Distribution.PackageDescription’, ‘Distribution.PackageDescription.Configuration’, ‘Distribution.Text’, ‘Distribution.Types.MungedPackageId’, ‘Distribution.Utils.Path’ nor ‘Distribution.Utils.ShortText’ export ‘initialBuildSteps’. | 413 | C.initialBuildSteps cPath pd (lbi { C.localPkgDescr = pd }) C.silent | ^^^^^^^^^^^^^^^^^^^ [103 of 108] Compiling Rules.Library[boot] ``` ## Expected behavior ghc-9.10 should be able to build itself including hadrian with its own Cabal. ## Environment * GHC version used: ghc-9.4.5 (this may seem contradicting but I am actually trying to build with ghc-9.4.5 and the Cabal shipped with ghc-9.10 - ie same story but compiling with ghc-9.4)