Add overlay that disables checks for packages inherited from nixpkgs

This is a more principled fix to #510 that will hopefully prevent this entire class of errors.

default.nix

@@ -222,10 +222,21 @@ lib.makeScope pkgs.newScope (self: {
                   setuptools-scm = super.setuptools_scm;
                 }
             )
+
+            # Fix infinite recursion in a lot of packages because of checkInputs
+            (self: super: lib.mapAttrs
+              (name: value: (
+                if lib.isDerivation value && lib.hasAttr "overridePythonAttrs" value
+                then value.overridePythonAttrs (_: { doCheck = false; })
+                else value
+              ))
+              super)
+
             # Null out any filtered packages, we don't want python.pkgs from nixpkgs
             (self: super: builtins.listToAttrs (builtins.map (x: { name = moduleName x.name; value = null; }) incompatible))
             # Create poetry2nix layer
             baseOverlay
+
           ] ++ # User provided overrides
           (if builtins.typeOf overrides == "list" then overrides else [ overrides ])
         );

overrides.nix

@@ -1362,11 +1362,6 @@ self: super:
     }
   );
 
-  pyparsing = super.pyparsing.overridePythonAttrs (old: {
-    # Prevent infinite recursion since checkInputs brings in coverage which in turn depends on pyparsing
-    doCheck = false;
-  });
-
   pyproject-flake8 = super.pyproject-flake8.overridePythonAttrs (
     old: {
       buildInputs = (old.buildInputs or [ ]) ++ [ self.flit-core ];