GHC 9.4.7 is now available

Zubin Duggal - 2023-08-25

The GHC developers are happy to announce the availability of GHC 9.4.7. Binary distributions, source distributions, and documentation are available at

This release is primarily a bugfix release addressing some issues found in 9.4.7. These include:

  • A bump to bytestring- allowing GHC to be bootstrapped on systems where the bootstrap compiler is built with the pthread_condattr_setclock symbol available (#23789).
  • A number of bug fixes for scoping bugs in the specialiser, preventing simplifier panics (#21391, #21689, #21828, #23762).
  • Distributing dynamically linked alpine bindists (#23349, #23828).
  • A bug fix for the release notes syntax, allowing them to built on systems with older python and sphinx versions (#23807, #23818).
  • … and a few more. See the release notes for a full accounting.

We would like to thank Microsoft Azure, GitHub, IOG, the Zw3rk stake pool, Well-Typed, Tweag I/O, Serokell, Equinix, SimSpace, Haskell Foundation, and other anonymous contributors whose on-going financial and in-kind support has facilitated GHC maintenance and release management over the years. Finally, this release would not have been possible without the hundreds of open-source contributors whose work comprise this release.

As always, do give this release a try and open a ticket if you see anything amiss.

Happy compiling,

  • Zubin