9.4.6 fails to build

warning: 'https://hydra.iohk.io' does not appear to be a binary cache
error: builder for '/nix/store/r68l9hwrkq205rylgg8a3l8jvj5pfqca-ghc-9.4.6.drv' failed with exit code 1;
       last 10 log lines:
       >      error: unknown type name ‘clockid_t’
       >        38 |     clockid_t timeout_clk;
       >           |     ^~~~~~~~~
       >    |
       > 38 |     clockid_t timeout_clk;
       >    |     ^
       > cc1: note: unrecognized command-line option ‘-Wno-nonportable-include-path’ may have been intended to silence earlier diagnostics
       > `cc' failed in phase `C Compiler'. (Exit code: 1)
       > Command failed
       > Build failed.
       For full logs, run 'nix log /nix/store/r68l9hwrkq205rylgg8a3l8jvj5pfqca-ghc-9.4.6.drv'