GHC 9.8.1 doesn't build in some cases

GHC 9.8.1 fails while building the unix package under some conditions which I have yet to identify. This is observed, at very least, in the ghc/ghc.nix> build: https://gitlab.haskell.org/bgamari/ghcs-nix/-/jobs/1687441:

compiling _build/stage0/libraries/unix/build/System/Posix/Files/Common_hsc_make.c failed (exit code 1)
rsp file was: "_build/stage0/libraries/unix/build/System/Posix/Files/hsc2hscall106337-0.rsp"
command was: /nix/store/dkw46jgi8i0bq64cag95v4ywz6g9bnga-gcc-wrapper-11.3.0/bin/cc -c _build/stage0/libraries/unix/build/System/Posix/Files/Common_hsc_make.c -o _build/stage0/libraries/unix/build/System/Posix/Files/Common_hsc_make.o -I/nix/store/7rk5v990931b5568961n0yk6fp6rd0mz-gmp-with-cxx-6.2.1-dev/include -I_build/stage0/libraries/unix/build -I_build/stage0/libraries/unix/build/include -Ilibraries/unix/include -I/tmp/nix-build-ghc-9.8.1.drv-0/source/libraries/time/lib/include -I/tmp/nix-build-ghc-9.8.1.drv-0/source/_build/stage0/libraries/time/build/lib/include -I/tmp/nix-build-ghc-9.8.1.drv-0/source/libraries/bytestring/include -I/tmp/nix-build-ghc-9.8.1.drv-0/source/_build/stage0/libraries/bytestring/build/include -I/nix/store/ggcw56r0aijq2h0nw2bk432qc9a0ibai-ghc-9.6.2/lib/ghc-9.6.2/lib/x86_64-linux-ghc-9.6.2/base-4.18.0.0/include -I/nix/store/7rk5v990931b5568961n0yk6fp6rd0mz-gmp-with-cxx-6.2.1-dev/include -I/nix/store/ggcw56r0aijq2h0nw2bk432qc9a0ibai-ghc-9.6.2/lib/ghc-9.6.2/lib/x86_64-linux-ghc-9.6.2/ghc-bignum-1.3/include -I/nix/store/s7n369rhajpnfhcvx1z8ljwhkrnx6hl3-libffi-3.4.4-dev/include -I/nix/store/ggcw56r0aijq2h0nw2bk432qc9a0ibai-ghc-9.6.2/lib/ghc-9.6.2/lib/x86_64-linux-ghc-9.6.2/rts-1.0.2/include -Wall -Werror=unused-but-set-variable -Wno-error=inline -include _build/stage0/libraries/unix/build/autogen/cabal_macros.h -Dx86_64_HOST_ARCH=1 -Dlinux_HOST_OS=1 -D__GLASGOW_HASKELL__=906
error: In file included from /nix/store/l1a7p8yp0nlvghq5vifz4qr6s11frxl5-glibc-2.35-224-dev/include/dlfcn.h:24,
                 from libraries/unix/include/HsUnix.h:87,
                 from Common.hsc:32:
Common.hsc: In function ‘main’:
Common.hsc:1164:29: error: ‘struct statx’ has no member named ‘stx_mnt_id’; did you mean ‘stx_uid’?
Common.hsc:1164:5: note: in expansion of macro ‘hsc_peek’

Unfortunately, this is almost certainly due to the fact that the unix bump in 34bd605d added support for statx.