## Summary Error messages: The following occurred when building in [PostgREST CI](https://github.com/PostgREST/postgrest/actions/runs/25174434211/job/73810192594?pr=4861) when building with NixOS - MacOS 15 image from `github/actions`. ``` error: Cannot build '/nix/store/ywj2kyywb6a4mnxd51cggv7q3g721y7p-postgrest-15.drv'. Reason: builder failed with exit code 1. Output paths: /nix/store/4cgygrggpmj3kmcjk8m18vpp1n8d8ha0-postgrest-15 /nix/store/i3pv1xz6rkykji43c6hcw0xc21cfd3w3-postgrest-15-bin Last 25 log lines: > <no location info>: error: > panic! (the 'impossible' happened) > GHC version 9.12.3: > lookupGREInfo > lookup failed: toUtf8 > Call stack: > CallStack (from HasCallStack): > callStackDoc, called at compiler/GHC/Utils/Panic.hs:190:37 in ghc-9.12.3-b311:GHC.Utils.Panic > pprPanic, called at compiler/GHC/Rename/Env.hs:2026:15 in ghc-9.12.3-b311:GHC.Rename.Env > > Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug ``` The following occurred when building with `--enable-profiling` in [PostgREST CI](https://github.com/PostgREST/postgrest/actions/runs/25174434187/job/73810761270?pr=4861). ``` [ 6 of 56] Compiling PostgREST.ApiRequest.Preferences ( src/PostgREST/ApiRequest/Preferences.hs, dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/build/PostgREST/ApiRequest/Preferences.o ) [ 7 of 56] Compiling PostgREST.Config.Proxy ( src/PostgREST/Config/Proxy.hs, dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/build/PostgREST/Config/Proxy.o, dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/build/PostgREST/Config/Proxy.dyn_o ) <no location info>: error: panic! (the 'impossible' happened) GHC version 9.12.3: lookupGREInfo lookup failed: toS Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/GHC/Utils/Panic.hs:190:37 in ghc-9.12.3-2625:GHC.Utils.Panic pprPanic, called at compiler/GHC/Rename/Env.hs:2026:15 in ghc-9.12.3-2625:GHC.Rename.Env Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug ``` and ``` [11 of 56] Compiling PostgREST.RangeQuery ( src/PostgREST/RangeQuery.hs, dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/build/PostgREST/RangeQuery.o, dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/build/PostgREST/RangeQuery.dyn_o ) <no location info>: error: Failed to load dynamic interface file for Protolude.Panic: Exception when reading interface file /home/runner/work/postgrest/postgrest/dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/l/protolude/build/protolude/Protolude/Panic.dyn_hi /home/runner/work/postgrest/postgrest/dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/l/protolude/build/protolude/Protolude/Panic.dyn_hi: withBinaryFile: does not exist (No such file or directory) [12 of 56] Compiling PostgREST.Response.GucHeader ( src/PostgREST/Response/GucHeader.hs, dist-prof/build/x86_64-linux/ghc-9.12.3/postgrest-15/build/PostgREST/Response/GucHeader.o ) <no location info>: error: panic! (the 'impossible' happened) GHC version 9.12.3: lookupGREInfo lookup failed: toUtf8 Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/GHC/Utils/Panic.hs:190:37 in ghc-9.12.3-2625:GHC.Utils.Panic pprPanic, called at compiler/GHC/Rename/Env.hs:2026:15 in ghc-9.12.3-2625:GHC.Rename.Env Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug ``` ## Steps to reproduce Not sure, but it involves building [protolude](https://github.com/protolude/protolude) library with GHC 9.12.3 and 9.12.4 from nixpkgs on MacOS 15, possibly with or without `--enable-profiling`. ## Expected behavior It should compile without any issues. ## Environment * GHC version used: GHC 9.12.3 and 9.12.4 from nixpkgs. Optional: * Operating System: MacOS - 15 * System Architecture: aarch64 or arm64 (not sure)