nix-tools: Add overrides for -compat libraries

Author: rvl

nix-tools/default.nix

@@ -4,7 +4,13 @@ let
   pkgSet = mkCabalProjectPkgSet {
     plan-pkgs = import ./pkgs.nix;
     pkg-def-extras = [];
-    modules = [];
+    modules = [
+      {
+        packages.transformers-compat.components.library.doExactConfig = true;
+        packages.time-compat.components.library.doExactConfig = true;
+        packages.time-locale-compat.components.library.doExactConfig = true;
+      }
+    ];
   };
 
   hsPkgs = pkgSet.config.hsPkgs;