Revert "flake: update nixpkgs pin 23.11->24.05 (+ boehmgc compat changes)"

This reverts commit 28a079f841834ac11105ce5762115904d1e40ce1.

Reason for revert: This caused a pile of regressions in CI, and does not pass nix flake check. Some number of them are fixed in CL: https://gerrit.lix.systems/c/lix/+/1429 but there's more to be fixed.

We should defer this after 2.90.

Change-Id: Ib839d0fcb08eb52094af2b521145e3c1b4e0556f

1 files changed, 1 insertions, 1 deletions

diff --git a/flake.nix b/flake.nix
index ebb3e38ef..fd8b7995e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "The purely functional package manager";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05-small";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11-small";
     nixpkgs-regression.url = "github:NixOS/nixpkgs/215d4d0fd80ca5163643b03a33fde804a29cc1e2";
     pre-commit-hooks = {
       url = "github:cachix/git-hooks.nix";