[nix] nixos-24.11 and it builds on my system with ghc 9.6.6

nix/pinned-24.11.nix

+import (builtins.fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-24.11.tar.gz")

nix/pkgs.nix

 { pkgs ? import (if builtins.elem builtins.currentSystem ["x86_64-darwin" "aarch64-darwin"]
                  then ./pinned-25.05.darwin.nix
-                 else ./pinned-25.05.nix) {} }:
+                 else ./pinned-24.11.nix) {} }:
 
 rec {
   inherit pkgs;
@@ -96,34 +96,35 @@ rec {
     pkgs.haskellPackages.pretty-show
   ];
   nonhsBuildInputs = with pkgs; [
+    #haskell-language-server
+    blas
     bzip2
+    curl
     czmq
     docker-compose
+    expat
+    gcc14
+    gfortran
     git
     gmp
+    graphviz
     gsl
-    #haskell-language-server
     hlint
-    libffi
-    lapack
-    xz
-    pcre
-    pkg-config
-    postgresql
-    xz
-    zlib
-    blas
-    gfortran
-    expat
     icu
-    graphviz
-    gcc13
     igraph_0_10_4
+    lapack
+    libffi
     libpqxx
     libsodium
     nanomsg
+    pcre
+    pkg-config
+    postgresql
+    stdenv.cc.cc.lib
+    xz
+    xz
     zeromq
-    curl
+    zlib
   ] ++ ( lib.optionals stdenv.isDarwin [
        darwin.apple_sdk.frameworks.Accelerate
        ]);