Hadrian error: in-tree arguments don't match out-of-tree arguments

The following error is visible in CI logs:

# ghc-config (for _build/test/ghcconfig)
Hadrian assertion failure: in-tree arguments don't match out-of-tree arguments.
Please report this bug on the GHC issue tracker. Continuing with in-tree arguments.
in-tree arguments:
TestCompilerArgs {hasDynamicRts = False, hasThreadedRts = True, hasDynamic = True, leadingUnderscore = False, withNativeCodeGen = True, withInterpreter = True, unregisterised = False, withSMP = True, debugAssertions = False, profiled = False, os = "linux", arch = "aarch64", platform = "aarch64-unknown-linux", wordsize = "64", libdir = "/builds/ghc/ghc/_build/stage0/lib", have_llvm = True, rtsLinker = True, pkgConfCacheFile = "/builds/ghc/ghc/_build/stage0/lib/package.conf.d/package.cache"}
out-of-tree arguments:
TestCompilerArgs {hasDynamicRts = False, hasThreadedRts = True, hasDynamic = False, leadingUnderscore = False, withNativeCodeGen = True, withInterpreter = True, unregisterised = False, withSMP = True, debugAssertions = True, profiled = False, os = "linux", arch = "aarch64", platform = "aarch64-unknown-linux", wordsize = "64", libdir = "/builds/ghc/ghc/_build/stage0/lib", have_llvm = True, rtsLinker = True, pkgConfCacheFile = "/builds/ghc/ghc/_build/stage0/lib/package.conf.d/package.cache"}

Example jobs:

https://gitlab.haskell.org/ghc/ghc/-/jobs/1150780

https://gitlab.haskell.org/ghc/ghc/-/jobs/1150781

https://gitlab.haskell.org/ghc/ghc/-/jobs/1150782

I used recent MR !8878 (closed) for concreteness, but it happens everywhere.

Presumably this error should make CI fail.