Make dependency function variadic and passthru args

This will enable feature flags such as enableFoo to be added in an override.

mk-poetry-dep.nix

@@ -20,7 +20,8 @@
 
 pythonPackages.callPackage (
   { preferWheel ? false
-  }:
+  , ...
+  }@args:
 
     let
 
@@ -116,6 +117,10 @@ pythonPackages.callPackage (
           license = [];
         };
 
+        passthru = {
+          inherit args;
+        };
+
         # We need to retrieve kind from the interpreter and the filename of the package
         # Interpreters should declare what wheel types they're compatible with (python type + ABI)
         # Here we can then choose a file based on that info.