Add mingwW64 back into ci (but not GHC 9.6.6)

Author: hamishmack

ci.nix

@@ -89,6 +89,11 @@
        || (system == "aarch64-darwin" && !builtins.elem compiler-nix-name ["ghc902" "ghc928" "ghc948" "ghc966" "ghc982" "ghc983" "ghc984"])
        )) {
     inherit (lib.systems.examples) ghcjs;
+  } // lib.optionalAttrs (
+         (__match ".*llvm" compiler-nix-name == null)
+      && ((system == "x86_64-linux"  && !builtins.elem compiler-nix-name ["ghc902" "ghc928" "ghc966"]) # Not sure why GHC 9.6.6 TH code now wants `log1pf`
+       || (system == "x86_64-darwin" && builtins.elem compiler-nix-name []))) { # TODO add ghc versions when we have more darwin build capacity
+    inherit (lib.systems.examples) mingwW64;
   } // lib.optionalAttrs (nixpkgsName == "unstable"
       && (__match ".*llvm" compiler-nix-name == null)
       && ((system == "x86_64-linux"  && !builtins.elem compiler-nix-name ["ghc8107" "ghc902" "ghc928" "ghc948"])